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git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
Pull strscpy string copy function implementation from Chris Metcalf.
Chris sent this during the merge window, but I waffled back and forth on
the pull request, which is why it's going in only now.
The new "strscpy()" function is definitely easier to use and more secure
than either strncpy() or strlcpy(), both of which are horrible nasty
interfaces that have serious and irredeemable problems.
strncpy() has a useless return value, and doesn't NUL-terminate an
overlong result. To make matters worse, it pads a short result with
zeroes, which is a performance disaster if you have big buffers.
strlcpy(), by contrast, is a mis-designed "fix" for strlcpy(), lacking
the insane NUL padding, but having a differently broken return value
which returns the original length of the source string. Which means
that it will read characters past the count from the source buffer, and
you have to trust the source to be properly terminated. It also makes
error handling fragile, since the test for overflow is unnecessarily
subtle.
strscpy() avoids both these problems, guaranteeing the NUL termination
(but not excessive padding) if the destination size wasn't zero, and
making the overflow condition very obvious by returning -E2BIG. It also
doesn't read past the size of the source, and can thus be used for
untrusted source data too.
So why did I waffle about this for so long?
Every time we introduce a new-and-improved interface, people start doing
these interminable series of trivial conversion patches.
And every time that happens, somebody does some silly mistake, and the
conversion patch to the improved interface actually makes things worse.
Because the patch is mindnumbing and trivial, nobody has the attention
span to look at it carefully, and it's usually done over large swatches
of source code which means that not every conversion gets tested.
So I'm pulling the strscpy() support because it *is* a better interface.
But I will refuse to pull mindless conversion patches. Use this in
places where it makes sense, but don't do trivial patches to fix things
that aren't actually known to be broken.
* 'strscpy' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
tile: use global strscpy() rather than private copy
string: provide strscpy()
Make asm/word-at-a-time.h available on all architectures
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Revert dff22d2054b5 ("PCI: Call pci_read_bridge_bases() from core instead
of arch code").
Reading PCI bridge windows is not arch-specific in itself, but there is PCI
core code that doesn't work correctly if we read them too early. For
example, Hannes found this case on an ARM Freescale i.mx6 board:
pci_bus 0000:00: root bus resource [mem 0x01000000-0x01efffff]
pci 0000:00:00.0: PCI bridge to [bus 01-ff]
pci 0000:00:00.0: BAR 8: no space for [mem size 0x01000000] (mem window)
pci 0000:01:00.0: BAR 2: failed to assign [mem size 0x00200000]
pci 0000:01:00.0: BAR 1: failed to assign [mem size 0x00004000]
pci 0000:01:00.0: BAR 0: failed to assign [mem size 0x00000100]
The 00:00.0 mem window needs to be at least 3MB: the 01:00.0 device needs
0x204100 of space, and mem windows are megabyte-aligned.
Bus sizing can increase a bridge window size, but never *decrease* it (see
d65245c3297a ("PCI: don't shrink bridge resources")). Prior to
dff22d2054b5, ARM didn't read bridge windows at all, so the "original size"
was zero, and we assigned a 3MB window.
After dff22d2054b5, we read the bridge windows before sizing the bus. The
firmware programmed a 16MB window (size 0x01000000) in 00:00.0, and since
we never decrease the size, we kept 16MB even though we only needed 3MB.
But 16MB doesn't fit in the host bridge aperture, so we failed to assign
space for the window and the downstream devices.
I think this is a defect in the PCI core: we shouldn't rely on the firmware
to assign sensible windows.
Ray reported a similar problem, also on ARM, with Broadcom iProc.
Issues like this are too hard to fix right now, so revert dff22d2054b5.
Reported-by: Hannes <oe5hpm@gmail.com>
Reported-by: Ray Jui <rjui@broadcom.com>
Link: http://lkml.kernel.org/r/CAAa04yFQEUJm7Jj1qMT57-LG7ZGtnhNDBe=PpSRa70Mj+XhW-A@mail.gmail.com
Link: http://lkml.kernel.org/r/55F75BB8.4070405@broadcom.com
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking and atomic updates from Ingo Molnar:
"Main changes in this cycle are:
- Extend atomic primitives with coherent logic op primitives
(atomic_{or,and,xor}()) and deprecate the old partial APIs
(atomic_{set,clear}_mask())
The old ops were incoherent with incompatible signatures across
architectures and with incomplete support. Now every architecture
supports the primitives consistently (by Peter Zijlstra)
- Generic support for 'relaxed atomics':
- _acquire/release/relaxed() flavours of xchg(), cmpxchg() and {add,sub}_return()
- atomic_read_acquire()
- atomic_set_release()
This came out of porting qwrlock code to arm64 (by Will Deacon)
- Clean up the fragile static_key APIs that were causing repeat bugs,
by introducing a new one:
DEFINE_STATIC_KEY_TRUE(name);
DEFINE_STATIC_KEY_FALSE(name);
which define a key of different types with an initial true/false
value.
Then allow:
static_branch_likely()
static_branch_unlikely()
to take a key of either type and emit the right instruction for the
case. To be able to know the 'type' of the static key we encode it
in the jump entry (by Peter Zijlstra)
- Static key self-tests (by Jason Baron)
- qrwlock optimizations (by Waiman Long)
- small futex enhancements (by Davidlohr Bueso)
- ... and misc other changes"
* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (63 commits)
jump_label/x86: Work around asm build bug on older/backported GCCs
locking, ARM, atomics: Define our SMP atomics in terms of _relaxed() operations
locking, include/llist: Use linux/atomic.h instead of asm/cmpxchg.h
locking/qrwlock: Make use of _{acquire|release|relaxed}() atomics
locking/qrwlock: Implement queue_write_unlock() using smp_store_release()
locking/lockref: Remove homebrew cmpxchg64_relaxed() macro definition
locking, asm-generic: Add _{relaxed|acquire|release}() variants for 'atomic_long_t'
locking, asm-generic: Rework atomic-long.h to avoid bulk code duplication
locking/atomics: Add _{acquire|release|relaxed}() variants of some atomic operations
locking, compiler.h: Cast away attributes in the WRITE_ONCE() magic
locking/static_keys: Make verify_keys() static
jump label, locking/static_keys: Update docs
locking/static_keys: Provide a selftest
jump_label: Provide a self-test
s390/uaccess, locking/static_keys: employ static_branch_likely()
x86, tsc, locking/static_keys: Employ static_branch_likely()
locking/static_keys: Add selftest
locking/static_keys: Add a new static_key interface
locking/static_keys: Rework update logic
locking/static_keys: Add static_key_{en,dis}able() helpers
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 mm updates from Ingo Molnar:
"The dominant change in this cycle was the continued work to isolate
kernel drivers from MTRR legacies: this tree gets rid of all kernel
internal driver interfaces to MTRRs (mostly by rewriting it to proper
PAT interfaces), the only access left is the /proc/mtrr ABI.
This work was done by Luis R Rodriguez.
There's also some related PCI interface additions for which I've
Cc:-ed Bjorn"
* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
x86/mm/mtrr: Remove kernel internal MTRR interfaces: unexport mtrr_add() and mtrr_del()
s390/io: Add pci_iomap_wc() and pci_iomap_wc_range()
drivers/dma/iop-adma: Use dma_alloc_writecombine() kernel-style
drivers/video/fbdev/vt8623fb: Use arch_phys_wc_add() and pci_iomap_wc()
drivers/video/fbdev/s3fb: Use arch_phys_wc_add() and pci_iomap_wc()
drivers/video/fbdev/arkfb.c: Use arch_phys_wc_add() and pci_iomap_wc()
PCI: Add pci_iomap_wc() variants
drivers/video/fbdev/gxt4500: Use pci_ioremap_wc_bar() to map framebuffer
drivers/video/fbdev/kyrofb: Use arch_phys_wc_add() and pci_ioremap_wc_bar()
drivers/video/fbdev/i740fb: Use arch_phys_wc_add() and pci_ioremap_wc_bar()
PCI: Add pci_ioremap_wc_bar()
x86/mm: Make kernel/check.c explicitly non-modular
x86/mm/pat: Make mm/pageattr[-test].c explicitly non-modular
x86/mm/pat: Add comments to cachemode translation tables
arch/*/io.h: Add ioremap_uc() to all architectures
drivers/video/fbdev/atyfb: Use arch_phys_wc_add() and ioremap_wc()
drivers/video/fbdev/atyfb: Replace MTRR UC hole with strong UC
drivers/video/fbdev/atyfb: Clarify ioremap() base and length used
drivers/video/fbdev/atyfb: Carve out framebuffer length fudging into a helper
x86/mm, asm-generic: Add IOMMU ioremap_uc() variant default
...
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git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI updates from Bjorn Helgaas:
"PCI changes for the v4.3 merge window:
Enumeration:
- Allocate ATS struct during enumeration (Bjorn Helgaas)
- Embed ATS info directly into struct pci_dev (Bjorn Helgaas)
- Reduce size of ATS structure elements (Bjorn Helgaas)
- Stop caching ATS Invalidate Queue Depth (Bjorn Helgaas)
- iommu/vt-d: Cache PCI ATS state and Invalidate Queue Depth (Bjorn Helgaas)
- Move MPS configuration check to pci_configure_device() (Bjorn Helgaas)
- Set MPS to match upstream bridge (Keith Busch)
- ARM/PCI: Set MPS before pci_bus_add_devices() (Murali Karicheri)
- Add pci_scan_root_bus_msi() (Lorenzo Pieralisi)
- ARM/PCI, designware, xilinx: Use pci_scan_root_bus_msi() (Lorenzo Pieralisi)
Resource management:
- Call pci_read_bridge_bases() from core instead of arch code (Lorenzo Pieralisi)
PCI device hotplug:
- pciehp: Remove unused interrupt events (Bjorn Helgaas)
- pciehp: Remove ignored MRL sensor interrupt events (Bjorn Helgaas)
- pciehp: Handle invalid data when reading from non-existent devices (Jarod Wilson)
- pciehp: Simplify pcie_poll_cmd() (Yijing Wang)
- Use "slot" and "pci_slot" for struct hotplug_slot and struct pci_slot (Yijing Wang)
- Protect pci_bus->slots with pci_slot_mutex, not pci_bus_sem (Yijing Wang)
- Hold pci_slot_mutex while searching bus->slots list (Yijing Wang)
Power management:
- Disable async suspend/resume for JMicron multi-function SATA/AHCI (Zhang Rui)
Virtualization:
- Add ACS quirks for Intel I219-LM/V (Alex Williamson)
- Restore ACS configuration as part of pci_restore_state() (Alexander Duyck)
MSI:
- Add pcibios_alloc_irq() and pcibios_free_irq() (Jiang Liu)
- x86: Implement pcibios_alloc_irq() and pcibios_free_irq() (Jiang Liu)
- Add helpers to manage pci_dev->irq and pci_dev->irq_managed (Jiang Liu)
- Free legacy IRQ when enabling MSI/MSI-X (Jiang Liu)
- ARM/PCI: Remove msi_controller from struct pci_sys_data (Lorenzo Pieralisi)
- Remove unused pcibios_msi_controller() hook (Lorenzo Pieralisi)
Generic host bridge driver:
- Remove dependency on ARM-specific struct hw_pci (Jayachandran C)
- Build setup-irq.o for arm64 (Jayachandran C)
- Add arm64 support (Jayachandran C)
APM X-Gene host bridge driver:
- Add APM X-Gene PCIe 64-bit prefetchable window (Duc Dang)
- Add support for a 64-bit prefetchable memory window (Duc Dang)
- Drop owner assignment from platform_driver (Krzysztof Kozlowski)
Broadcom iProc host bridge driver:
- Allow BCMA bus driver to be built as module (Hauke Mehrtens)
- Delete unnecessary checks before phy calls (Markus Elfring)
- Add arm64 support (Ray Jui)
Synopsys DesignWare host bridge driver:
- Don't complain missing *config* reg space if va_cfg0 is set (Murali Karicheri)
TI DRA7xx host bridge driver:
- Disable pm_runtime on get_sync failure (Kishon Vijay Abraham I)
- Add PM support (Kishon Vijay Abraham I)
- Clear MSE bit during suspend so clocks will idle (Kishon Vijay Abraham I)
- Add support to make GPIO drive PERST# line (Kishon Vijay Abraham I)
Xilinx AXI host bridge driver:
- Check for MSI interrupt flag before handling as INTx (Russell Joyce)
Miscellaneous:
- Fix Intersil/Techwell TW686[4589] AV capture class code (Krzysztof Hałasa)
- Use PCI_CLASS_SERIAL_USB instead of bare number (Bjorn Helgaas)
- Fix generic NCR 53c810 class code quirk (Bjorn Helgaas)
- Fix TI816X class code quirk (Bjorn Helgaas)
- Remove unused "pci_probe" flags (Bjorn Helgaas)
- Host bridge driver code simplifications (Fabio Estevam)
- Add dev_flags bit to access VPD through function 0 (Mark Rustad)
- Add VPD function 0 quirk for Intel Ethernet devices (Mark Rustad)
- Kill off set_irq_flags() usage (Rob Herring)
- Remove Intel Cherrytrail D3 delays (Srinidhi Kasagar)
- Clean up pci_find_capability() (Wei Yang)"
* tag 'pci-v4.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (72 commits)
PCI: Disable async suspend/resume for JMicron multi-function SATA/AHCI
PCI: Set MPS to match upstream bridge
PCI: Move MPS configuration check to pci_configure_device()
PCI: Drop references acquired by of_parse_phandle()
PCI/MSI: Remove unused pcibios_msi_controller() hook
ARM/PCI: Remove msi_controller from struct pci_sys_data
ARM/PCI, designware, xilinx: Use pci_scan_root_bus_msi()
PCI: Add pci_scan_root_bus_msi()
ARM/PCI: Replace panic with WARN messages on failures
PCI: generic: Add arm64 support
PCI: Build setup-irq.o for arm64
PCI: generic: Remove dependency on ARM-specific struct hw_pci
PCI: imx6: Simplify a trivial if-return sequence
PCI: spear: Use BUG_ON() instead of condition followed by BUG()
PCI: dra7xx: Remove unneeded use of IS_ERR_VALUE()
PCI: Remove pci_ats_enabled()
PCI: Stop caching ATS Invalidate Queue Depth
PCI: Move ATS declarations to linux/pci.h so they're all together
PCI: Clean up ATS error handling
PCI: Use pci_physfn() rather than looking up physfn by hand
...
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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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'pci/virtualization' into next
* pci/irq:
PCI/MSI: Free legacy IRQ when enabling MSI/MSI-X
PCI: Add helpers to manage pci_dev->irq and pci_dev->irq_managed
PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()
PCI: Add pcibios_alloc_irq() and pcibios_free_irq()
* pci/misc:
PCI: Remove unused "pci_probe" flags
PCI: Add VPD function 0 quirk for Intel Ethernet devices
PCI: Add dev_flags bit to access VPD through function 0
PCI / ACPI: Fix pci_acpi_optimize_delay() comment
PCI: Remove a broken link in quirks.c
PCI: Remove useless redundant code
PCI: Simplify pci_find_(ext_)capability() return value checks
PCI: Move PCI_FIND_CAP_TTL to pci.h and use it in quirks
PCI: Add pcie_downstream_port() (true for Root and Switch Downstream Ports)
PCI: Fix pcie_port_device_resume() comment
PCI: Shift PCI_CLASS_NOT_DEFINED consistently with other classes
PCI: Revert aeb30016fec3 ("PCI: add Intel USB specific reset method")
PCI: Fix TI816X class code quirk
PCI: Fix generic NCR 53c810 class code quirk
PCI: Use PCI_CLASS_SERIAL_USB instead of bare number
PCI: Add quirk for Intersil/Techwell TW686[4589] AV capture cards
PCI: Remove Intel Cherrytrail D3 delays
* pci/resource:
PCI: Call pci_read_bridge_bases() from core instead of arch code
* pci/virtualization:
PCI: Restore ACS configuration as part of pci_restore_state()
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This adds ioremap_uc() only for architectures that do not
include asm-generic.h/io.h as that already provides a default
definition for them for both cases where you have CONFIG_MMU
and you do not, and because of this, the number of architectures
this patch address is less than the architectures that the
ioremap_wt() patch addressed, "arch/*/io.h: Add ioremap_wt() to
all architectures").
In order to reduce the number of architectures we have to
modify by adding new architecture IO APIs we'll have to review
the architectures in this patch, see why they can't add
asm-generic.h/io.h or issues that would be created by doing
so and then spread a consistent inclusion of this header
towards the end of their own header. For instance arch/metag
includes the asm-generic/io.h *before* the ioremap*()
definitions, this should be the other way around but only
once we have guard wrappers for the non-MMU case also for
asm-generic/io.h.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Abhilash Kesavan <a.kesavan@samsung.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Greg Ungerer <gerg@uclinux.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Kyle McMartin <kyle@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-am33-list@redhat.com
Cc: linux-arch@vger.kernel.org
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-sh@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lkml.kernel.org/r/20150728181713.GB30479@wotan.suse.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The following flags are only used on x86, but they got copied to FR-V,
MN10300, and SuperH:
PCI_PROBE_BIOS
PCI_PROBE_CONF1
PCI_PROBE_CONF2
PCI_ASSIGN_ROMS
PCI_NO_CHECKS
PCI_BIOS_IRQ_SCAN
PCI_ASSIGN_ALL_BUSSES
FR-V and MN10300 do test for PCI_ASSIGN_ROMS, but they never set it, so
it's dead code.
Remove the unused flags above.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Move the now generic definitions of atomic_{set,clear}_mask() into
linux/atomic.h to avoid endless and pointless repetition.
Also, provide an atomic_andnot() wrapper for those few archs that can
implement that.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Implement atomic logic ops -- atomic_{or,xor,and}.
These will replace the atomic_{set,clear}_mask functions that are
available on some archs.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Mostly complete rewrite of the FRV atomic implementation, instead of
using assembly files, use inline assembler.
The out-of-line CONFIG option makes a bit of a mess of things, but a
little CPP trickery gets that done too.
FRV already had the atomic logic ops but under a non standard name,
the reimplementation provides the generic names and provides the
intermediate form required for the bitops implementation.
The slightly inconsistent __atomic32_fetch_##op naming is because
__atomic_fetch_##op conlicts with GCC builtin functions.
The 64bit atomic ops use the inline assembly %Ln construct to access
the low word register (r+1), afaik this construct was not previously
used in the kernel and is completely undocumented, but I found it in
the FRV GCC code and it seems to work.
FRV had a non-standard definition of atomic_{clear,set}_mask() which
would work types other than atomic_t, the one user relying on that
(arch/frv/kernel/dma.c) got converted to use the new intermediate
form.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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When we scan a PCI bus, we read PCI-PCI bridge window registers with
pci_read_bridge_bases() so we can validate the resource hierarchy. Most
architectures call pci_read_bridge_bases() from pcibios_fixup_bus(), but
PCI-PCI bridges are not arch-specific, so this doesn't need to be in
arch-specific code.
Call pci_read_bridge_bases() directly from the PCI core instead of from
arch code.
For alpha and mips, we now call pci_read_bridge_bases() always; previously
we only called it if PCI_PROBE_ONLY was set.
[bhelgaas: changelog]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: James E.J. Bottomley <jejb@parisc-linux.org>
CC: Michael Ellerman <mpe@ellerman.id.au>
CC: Bjorn Helgaas <bhelgaas@google.com>
CC: Richard Henderson <rth@twiddle.net>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: David Howells <dhowells@redhat.com>
CC: Russell King <linux@arm.linux.org.uk>
CC: Tony Luck <tony.luck@intel.com>
CC: David S. Miller <davem@davemloft.net>
CC: Ingo Molnar <mingo@redhat.com>
CC: Guenter Roeck <linux@roeck-us.net>
CC: Michal Simek <monstr@monstr.eu>
CC: Chris Zankel <chris@zankel.net>
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Commit 2ae416b142b6 ("mm: new mm hook framework") introduced an empty
header file (mm-arch-hooks.h) for every architecture, even those which
doesn't need to define mm hooks.
As suggested by Geert Uytterhoeven, this could be cleaned through the use
of a generic header file included via each per architecture
asm/include/Kbuild file.
The PowerPC architecture is not impacted here since this architecture has
to defined the arch_remap MM hook.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Added the x86 implementation of word-at-a-time to the
generic version, which previously only supported big-endian.
Omitted the x86-specific load_unaligned_zeropad(), which in
any case is also not present for the existing BE-only
implementation of a word-at-a-time, and is only used under
CONFIG_DCACHE_WORD_ACCESS.
Added as a "generic-y" to the Kbuilds of all architectures
that didn't previously have it.
Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
Pull implicit module.h fixes from Paul Gortmaker:
"Fix up implicit <module.h> users that will break later.
The files changed here are simply modular source files that are
implicitly relying on <module.h> being present. We fix them up now,
so that we can decouple some of the module related init code from the
core init code in the future.
The addition of the module.h include to several files here is also a
no-op from a code generation point of view, else there would already
be compile issues with these files today.
There may be lots more implicit includes of <module.h> in tree, but
these are the ones that extensive build test coverage has shown that
must be fixed in order to avoid build breakage fallout for the pending
module.h <---> init.h code relocation we desire to complete"
* tag 'module-implicit-v4.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:
frv: add module.h to mb93090-mb00/flash.c to avoid compile fail
drivers/cpufreq: include <module.h> for modular exynos-cpufreq.c code
drivers/staging: include <module.h> for modular android tegra_ion code
crypto/asymmetric_keys: pkcs7_key_type needs module.h
sh: mach-highlander/psw.c is tristate and should use module.h
drivers/regulator: include <module.h> for modular max77802 code
drivers/pcmcia: include <module.h> for modular xxs1500_ss code
drivers/hsi: include <module.h> for modular omap_ssi code
drivers/gpu: include <module.h> for modular rockchip code
drivers/gpio: include <module.h> for modular crystalcove code
drivers/clk: include <module.h> for clk-max77xxx modular code
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Merge second patchbomb from Andrew Morton:
- most of the rest of MM
- lots of misc things
- procfs updates
- printk feature work
- updates to get_maintainer, MAINTAINERS, checkpatch
- lib/ updates
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (96 commits)
exit,stats: /* obey this comment */
coredump: add __printf attribute to cn_*printf functions
coredump: use from_kuid/kgid when formatting corename
fs/reiserfs: remove unneeded cast
NILFS2: support NFSv2 export
fs/befs/btree.c: remove unneeded initializations
fs/minix: remove unneeded cast
init/do_mounts.c: add create_dev() failure log
kasan: remove duplicate definition of the macro KASAN_FREE_PAGE
fs/efs: femove unneeded cast
checkpatch: emit "NOTE: <types>" message only once after multiple files
checkpatch: emit an error when there's a diff in a changelog
checkpatch: validate MODULE_LICENSE content
checkpatch: add multi-line handling for PREFER_ETHER_ADDR_COPY
checkpatch: suggest using eth_zero_addr() and eth_broadcast_addr()
checkpatch: fix processing of MEMSET issues
checkpatch: suggest using ether_addr_equal*()
checkpatch: avoid NOT_UNIFIED_DIFF errors on cover-letter.patch files
checkpatch: remove local from codespell path
checkpatch: add --showfile to allow input via pipe to show filenames
...
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This replaces the plain loop over the sglist array with for_each_sg()
macro which consists of sg_next() function calls. Since frv doesn't
select ARCH_HAS_SG_CHAIN, it is not necessary to use for_each_sg() in
order to loop over each sg element. But this can help find problems
with drivers that do not properly initialize their sg tables when
CONFIG_DEBUG_SG is enabled.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The function is not used anywhere in the tree (anymore) and this is the
last remaining instance, so remove it.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull asm/scatterlist.h removal from Jens Axboe:
"We don't have any specific arch scatterlist anymore, since parisc
finally switched over. Kill the include"
* 'for-4.2/sg' of git://git.kernel.dk/linux-block:
remove scatterlist.h generation from arch Kbuild files
remove <asm/scatterlist.h>
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CRIU is recreating the process memory layout by remapping the checkpointee
memory area on top of the current process (criu). This includes remapping
the vDSO to the place it has at checkpoint time.
However some architectures like powerpc are keeping a reference to the
vDSO base address to build the signal return stack frame by calling the
vDSO sigreturn service. So once the vDSO has been moved, this reference
is no more valid and the signal frame built later are not usable.
This patch serie is introducing a new mm hook framework, and a new
arch_remap hook which is called when mremap is done and the mm lock still
hold. The next patch is adding the vDSO remap and unmap tracking to the
powerpc architecture.
This patch (of 3):
This patch introduces a new set of header file to manage mm hooks:
- per architecture empty header file (arch/x/include/asm/mm-arch-hooks.h)
- a generic header (include/linux/mm-arch-hooks.h)
The architecture which need to overwrite a hook as to redefine it in its
header file, while architecture which doesn't need have nothing to do.
The default hooks are defined in the generic header and are used in the
case the architecture is not defining it.
In a next step, mm hooks defined in include/asm-generic/mm_hooks.h should
be moved here.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI updates from Bjorn Helgaas:
"PCI changes for the v4.2 merge window:
Enumeration
- Move pci_ari_enabled() to global header (Alex Williamson)
- Account for ARI in _PRT lookups (Alex Williamson)
- Remove unused pci_scan_bus_parented() (Yijing Wang)
Resource management
- Use host bridge _CRS info on systems with >32 bit addressing (Bjorn Helgaas)
- Use host bridge _CRS info on Foxconn K8M890-8237A (Bjorn Helgaas)
- Fix pci_address_to_pio() conversion of CPU address to I/O port (Zhichang Yuan)
- Add pci_bus_addr_t (Yinghai Lu)
PCI device hotplug
- Wait for pciehp command completion where necessary (Alex Williamson)
- Drop pointless ACPI-based "slot detection" check (Rafael J. Wysocki)
- Check ignore_hotplug for all downstream devices (Rafael J. Wysocki)
- Propagate the "ignore hotplug" setting to parent (Rafael J. Wysocki)
- Inline pciehp "handle event" functions into the ISR (Bjorn Helgaas)
- Clean up pciehp debug logging (Bjorn Helgaas)
Power management
- Remove redundant PCIe port type checking (Yijing Wang)
- Add dev->has_secondary_link to track downstream PCIe links (Yijing Wang)
- Use dev->has_secondary_link to find downstream links for ASPM (Yijing Wang)
- Drop __pci_disable_link_state() useless "force" parameter (Bjorn Helgaas)
- Simplify Clock Power Management setting (Bjorn Helgaas)
Virtualization
- Add ACS quirks for Intel 9-series PCH root ports (Alex Williamson)
- Add function 1 DMA alias quirk for Marvell 9120 (Sakari Ailus)
MSI
- Disable MSI at enumeration even if kernel doesn't support MSI (Michael S. Tsirkin)
- Remove unused pci_msi_off() (Bjorn Helgaas)
- Rename msi_set_enable(), msix_clear_and_set_ctrl() (Michael S. Tsirkin)
- Export pci_msi_set_enable(), pci_msix_clear_and_set_ctrl() (Michael S. Tsirkin)
- Drop pci_msi_off() calls during probe (Michael S. Tsirkin)
APM X-Gene host bridge driver
- Add APM X-Gene v1 PCIe MSI/MSIX termination driver (Duc Dang)
- Add APM X-Gene PCIe MSI DTS nodes (Duc Dang)
- Disable Configuration Request Retry Status for v1 silicon (Duc Dang)
- Allow config access to Root Port even when link is down (Duc Dang)
Broadcom iProc host bridge driver
- Allow override of device tree IRQ mapping function (Hauke Mehrtens)
- Add BCMA PCIe driver (Hauke Mehrtens)
- Directly add PCI resources (Hauke Mehrtens)
- Free resource list after registration (Hauke Mehrtens)
Freescale i.MX6 host bridge driver
- Add speed change timeout message (Troy Kisky)
- Rename imx6_pcie_start_link() to imx6_pcie_establish_link() (Bjorn Helgaas)
Freescale Layerscape host bridge driver
- Use dw_pcie_link_up() consistently (Bjorn Helgaas)
- Factor out ls_pcie_establish_link() (Bjorn Helgaas)
Marvell MVEBU host bridge driver
- Remove mvebu_pcie_scan_bus() (Yijing Wang)
NVIDIA Tegra host bridge driver
- Remove tegra_pcie_scan_bus() (Yijing Wang)
Synopsys DesignWare host bridge driver
- Consolidate outbound iATU programming functions (Jisheng Zhang)
- Use iATU0 for cfg and IO, iATU1 for MEM (Jisheng Zhang)
- Add support for x8 links (Zhou Wang)
- Wait for link to come up with consistent style (Bjorn Helgaas)
- Use pci_scan_root_bus() for simplicity (Yijing Wang)
TI DRA7xx host bridge driver
- Use dw_pcie_link_up() consistently (Bjorn Helgaas)
Miscellaneous
- Include <linux/pci.h>, not <asm/pci.h> (Bjorn Helgaas)
- Remove unnecessary #includes of <asm/pci.h> (Bjorn Helgaas)
- Remove unused pcibios_select_root() (again) (Bjorn Helgaas)
- Remove unused pci_dma_burst_advice() (Bjorn Helgaas)
- xen/pcifront: Don't use deprecated function pci_scan_bus_parented() (Arnd Bergmann)"
* tag 'pci-v4.2-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (58 commits)
PCI: pciehp: Inline the "handle event" functions into the ISR
PCI: pciehp: Rename queue_interrupt_event() to pciehp_queue_interrupt_event()
PCI: pciehp: Make queue_interrupt_event() void
PCI: xgene: Allow config access to Root Port even when link is down
PCI: xgene: Disable Configuration Request Retry Status for v1 silicon
PCI: pciehp: Clean up debug logging
x86/PCI: Use host bridge _CRS info on systems with >32 bit addressing
PCI: imx6: Add #define PCIE_RC_LCSR
PCI: imx6: Use "u32", not "uint32_t"
PCI: Remove unused pci_scan_bus_parented()
xen/pcifront: Don't use deprecated function pci_scan_bus_parented()
PCI: imx6: Add speed change timeout message
PCI/ASPM: Simplify Clock Power Management setting
PCI: designware: Wait for link to come up with consistent style
PCI: layerscape: Factor out ls_pcie_establish_link()
PCI: layerscape: Use dw_pcie_link_up() consistently
PCI: dra7xx: Use dw_pcie_link_up() consistently
x86/PCI: Use host bridge _CRS info on Foxconn K8M890-8237A
PCI: pciehp: Wait for hotplug command completion where necessary
PCI: Remove unused pci_dma_burst_advice()
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 core updates from Ingo Molnar:
"There were so many changes in the x86/asm, x86/apic and x86/mm topics
in this cycle that the topical separation of -tip broke down somewhat -
so the result is a more traditional architecture pull request,
collected into the 'x86/core' topic.
The topics were still maintained separately as far as possible, so
bisectability and conceptual separation should still be pretty good -
but there were a handful of merge points to avoid excessive
dependencies (and conflicts) that would have been poorly tested in the
end.
The next cycle will hopefully be much more quiet (or at least will
have fewer dependencies).
The main changes in this cycle were:
* x86/apic changes, with related IRQ core changes: (Jiang Liu, Thomas
Gleixner)
- This is the second and most intrusive part of changes to the x86
interrupt handling - full conversion to hierarchical interrupt
domains:
[IOAPIC domain] -----
|
[MSI domain] --------[Remapping domain] ----- [ Vector domain ]
| (optional) |
[HPET MSI domain] ----- |
|
[DMAR domain] -----------------------------
|
[Legacy domain] -----------------------------
This now reflects the actual hardware and allowed us to distangle
the domain specific code from the underlying parent domain, which
can be optional in the case of interrupt remapping. It's a clear
separation of functionality and removes quite some duct tape
constructs which plugged the remap code between ioapic/msi/hpet
and the vector management.
- Intel IOMMU IRQ remapping enhancements, to allow direct interrupt
injection into guests (Feng Wu)
* x86/asm changes:
- Tons of cleanups and small speedups, micro-optimizations. This
is in preparation to move a good chunk of the low level entry
code from assembly to C code (Denys Vlasenko, Andy Lutomirski,
Brian Gerst)
- Moved all system entry related code to a new home under
arch/x86/entry/ (Ingo Molnar)
- Removal of the fragile and ugly CFI dwarf debuginfo annotations.
Conversion to C will reintroduce many of them - but meanwhile
they are only getting in the way, and the upstream kernel does
not rely on them (Ingo Molnar)
- NOP handling refinements. (Borislav Petkov)
* x86/mm changes:
- Big PAT and MTRR rework: making the code more robust and
preparing to phase out exposing direct MTRR interfaces to drivers -
in favor of using PAT driven interfaces (Toshi Kani, Luis R
Rodriguez, Borislav Petkov)
- New ioremap_wt()/set_memory_wt() interfaces to support
Write-Through cached memory mappings. This is especially
important for good performance on NVDIMM hardware (Toshi Kani)
* x86/ras changes:
- Add support for deferred errors on AMD (Aravind Gopalakrishnan)
This is an important RAS feature which adds hardware support for
poisoned data. That means roughly that the hardware marks data
which it has detected as corrupted but wasn't able to correct, as
poisoned data and raises an APIC interrupt to signal that in the
form of a deferred error. It is the OS's responsibility then to
take proper recovery action and thus prolonge system lifetime as
far as possible.
- Add support for Intel "Local MCE"s: upcoming CPUs will support
CPU-local MCE interrupts, as opposed to the traditional system-
wide broadcasted MCE interrupts (Ashok Raj)
- Misc cleanups (Borislav Petkov)
* x86/platform changes:
- Intel Atom SoC updates
... and lots of other cleanups, fixlets and other changes - see the
shortlog and the Git log for details"
* 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (222 commits)
x86/hpet: Use proper hpet device number for MSI allocation
x86/hpet: Check for irq==0 when allocating hpet MSI interrupts
x86/mm/pat, drivers/infiniband/ipath: Use arch_phys_wc_add() and require PAT disabled
x86/mm/pat, drivers/media/ivtv: Use arch_phys_wc_add() and require PAT disabled
x86/platform/intel/baytrail: Add comments about why we disabled HPET on Baytrail
genirq: Prevent crash in irq_move_irq()
genirq: Enhance irq_data_to_desc() to support hierarchy irqdomain
iommu, x86: Properly handle posted interrupts for IOMMU hotplug
iommu, x86: Provide irq_remapping_cap() interface
iommu, x86: Setup Posted-Interrupts capability for Intel iommu
iommu, x86: Add cap_pi_support() to detect VT-d PI capability
iommu, x86: Avoid migrating VT-d posted interrupts
iommu, x86: Save the mode (posted or remapped) of an IRTE
iommu, x86: Implement irq_set_vcpu_affinity for intel_ir_chip
iommu: dmar: Provide helper to copy shared irte fields
iommu: dmar: Extend struct irte for VT-d Posted-Interrupts
iommu: Add new member capability to struct irq_remap_ops
x86/asm/entry/64: Disentangle error_entry/exit gsbase/ebx/usermode code
x86/asm/entry/32: Shorten __audit_syscall_entry() args preparation
x86/asm/entry/32: Explain reloading of registers after __audit_syscall_entry()
...
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This file is built off of a tristate Kconfig option and also contains
modular function calls so it should explicitly include module.h to
avoid compile breakage during header shuffles done in the future.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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pci_dma_burst_advice() was added by e24c2d963a60 ("[PATCH] PCI: DMA
bursting advice") but apparently never used. Remove it.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Michal Simek <monstr@monstr.eu> # microblaze
CC: David S. Miller <davem@davemloft.net>
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Replace all calls to ioremap_writethrough() with ioremap_wt().
Remove ioremap_writethrough() too.
Signed-off-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Elliott@hp.com
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: arnd@arndb.de
Cc: hch@lst.de
Cc: hmh@hmh.eng.br
Cc: jgross@suse.com
Cc: konrad.wilk@oracle.com
Cc: linux-mm <linux-mm@kvack.org>
Cc: linux-nvdimm@lists.01.org
Cc: stefan.bader@canonical.com
Cc: yigal@plexistor.com
Link: http://lkml.kernel.org/r/1433436928-31903-10-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Add ioremap_wt() to all arch-specific asm/io.h headers which
define ioremap_wc() locally. These headers do not include
<asm-generic/iomap.h>. Some of them include <asm-generic/io.h>,
but ioremap_wt() is defined for consistency since they define
all ioremap_xxx locally.
In all architectures without Write-Through support, ioremap_wt()
is defined indentical to ioremap_nocache().
frv and m68k already have ioremap_writethrough(). On those we
add ioremap_wt() indetical to ioremap_writethrough() and defines
ARCH_HAS_IOREMAP_WT in both architectures.
The ioremap_wt() interface is exported to drivers.
Signed-off-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Elliott@hp.com
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: arnd@arndb.de
Cc: hch@lst.de
Cc: hmh@hmh.eng.br
Cc: jgross@suse.com
Cc: konrad.wilk@oracle.com
Cc: linux-mm <linux-mm@kvack.org>
Cc: linux-nvdimm@lists.01.org
Cc: stefan.bader@canonical.com
Cc: yigal@plexistor.com
Link: http://lkml.kernel.org/r/1433436928-31903-9-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
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Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
|
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the handler
Introduce faulthandler_disabled() and use it to check for irq context and
disabled pagefaults (via pagefault_disable()) in the pagefault handlers.
Please note that we keep the in_atomic() checks in place - to detect
whether in irq context (in which case preemption is always properly
disabled).
In contrast, preempt_disable() should never be used to disable pagefaults.
With !CONFIG_PREEMPT_COUNT, preempt_disable() doesn't modify the preempt
counter, and therefore the result of in_atomic() differs.
We validate that condition by using might_fault() checks when calling
might_sleep().
Therefore, add a comment to faulthandler_disabled(), describing why this
is needed.
faulthandler_disabled() and pagefault_disable() are defined in
linux/uaccess.h, so let's properly add that include to all relevant files.
This patch is based on a patch from Thomas Gleixner.
Reviewed-and-tested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: David.Laight@ACULAB.COM
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: airlied@linux.ie
Cc: akpm@linux-foundation.org
Cc: benh@kernel.crashing.org
Cc: bigeasy@linutronix.de
Cc: borntraeger@de.ibm.com
Cc: daniel.vetter@intel.com
Cc: heiko.carstens@de.ibm.com
Cc: herbert@gondor.apana.org.au
Cc: hocko@suse.cz
Cc: hughd@google.com
Cc: mst@redhat.com
Cc: paulus@samba.org
Cc: ralf@linux-mips.org
Cc: schwidefsky@de.ibm.com
Cc: yang.shi@windriver.com
Link: http://lkml.kernel.org/r/1431359540-32227-7-git-send-email-dahi@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The existing code relies on pagefault_disable() implicitly disabling
preemption, so that no schedule will happen between kmap_atomic() and
kunmap_atomic().
Let's make this explicit, to prepare for pagefault_disable() not
touching preemption anymore.
Reviewed-and-tested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: David.Laight@ACULAB.COM
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: airlied@linux.ie
Cc: akpm@linux-foundation.org
Cc: benh@kernel.crashing.org
Cc: bigeasy@linutronix.de
Cc: borntraeger@de.ibm.com
Cc: daniel.vetter@intel.com
Cc: heiko.carstens@de.ibm.com
Cc: herbert@gondor.apana.org.au
Cc: hocko@suse.cz
Cc: hughd@google.com
Cc: mst@redhat.com
Cc: paulus@samba.org
Cc: ralf@linux-mips.org
Cc: schwidefsky@de.ibm.com
Cc: yang.shi@windriver.com
Link: http://lkml.kernel.org/r/1431359540-32227-5-git-send-email-dahi@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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We don't have any arch specific scatterlist now that parisc switched over
to the generic one.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull second batch of devicetree updates from Rob Herring:
"As Grant mentioned in the first devicetree pull request, here is the
2nd batch of DT changes for 4.1. The main remaining item here is the
endianness bindings and related 8250 driver support.
- DT endianness specification bindings
- big-endian 8250 serial support
- DT overlay unittest updates
- various DT doc updates
- compile fixes for OF_IRQ=n"
* tag 'devicetree-for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
frv: add io{read,write}{16,32}be functions
mn10300: add io{read,write}{16,32}be functions
Documentation: DT bindings: add doc for Altera's SoCFPGA platform
of: base: improve of_get_next_child() kernel-doc
Doc: dt: arch_timer: discourage clock-frequency use
of: unittest: overlay: Keep track of created overlays
of/fdt: fix allocation size for device node path
serial: of_serial: Support big-endian register accesses
serial: 8250: Add support for big-endian MMIO accesses
of: Document {little,big,native}-endian bindings
of/fdt: Add endianness helper function for early init code
of: Add helper function to check MMIO register endianness
of/fdt: Remove "reg" data prints from early_init_dt_scan_memory
of: add vendor prefix for Artesyn
of: Add dummy of_irq_to_resource_table() for IRQ_OF=n
of: OF_IRQ should depend on IRQ_DOMAIN
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These functions are used in various drivers, including the latest
version of the 8250 driver. The latter causes the following build
failure.
drivers/tty/serial/8250/8250_core.c: In function 'mem32be_serial_out':
drivers/tty/serial/8250/8250_core.c:456:2: error:
implicit declaration of function 'iowrite32be'
drivers/tty/serial/8250/8250_core.c: In function 'mem32be_serial_in':
drivers/tty/serial/8250/8250_core.c:462:2: error:
implicit declaration of function 'ioread32be'
Cc: Kevin Cernekee <cernekee@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixes: c627f2ceb692 ("serial: 8250: Add support for big-endian MMIO
accesses")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Rob Herring <robh@kernel.org>
|
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git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc
Pull exec domain removal from Richard Weinberger:
"This series removes execution domain support from Linux.
The idea behind exec domains was to support different ABIs. The
feature was never complete nor stable. Let's rip it out and make the
kernel signal handling code less complicated"
* 'exec_domain_rip_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (27 commits)
arm64: Removed unused variable
sparc: Fix execution domain removal
Remove rest of exec domains.
arch: Remove exec_domain from remaining archs
arc: Remove signal translation and exec_domain
xtensa: Remove signal translation and exec_domain
xtensa: Autogenerate offsets in struct thread_info
x86: Remove signal translation and exec_domain
unicore32: Remove signal translation and exec_domain
um: Remove signal translation and exec_domain
tile: Remove signal translation and exec_domain
sparc: Remove signal translation and exec_domain
sh: Remove signal translation and exec_domain
s390: Remove signal translation and exec_domain
mn10300: Remove signal translation and exec_domain
microblaze: Remove signal translation and exec_domain
m68k: Remove signal translation and exec_domain
m32r: Remove signal translation and exec_domain
m32r: Autogenerate offsets in struct thread_info
frv: Remove signal translation and exec_domain
...
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs update from Al Viro:
"Part one:
- struct filename-related cleanups
- saner iov_iter_init() replacements (and switching the syscalls to
use of those)
- ntfs switch to ->write_iter() (Anton)
- aio cleanups and splitting iocb into common and async parts
(Christoph)
- assorted fixes (me, bfields, Andrew Elble)
There's a lot more, including the completion of switchover to
->{read,write}_iter(), d_inode/d_backing_inode annotations, f_flags
race fixes, etc, but that goes after #for-davem merge. David has
pulled it, and once it's in I'll send the next vfs pull request"
* 'for-linus-1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (35 commits)
sg_start_req(): use import_iovec()
sg_start_req(): make sure that there's not too many elements in iovec
blk_rq_map_user(): use import_single_range()
sg_io(): use import_iovec()
process_vm_access: switch to {compat_,}import_iovec()
switch keyctl_instantiate_key_common() to iov_iter
switch {compat_,}do_readv_writev() to {compat_,}import_iovec()
aio_setup_vectored_rw(): switch to {compat_,}import_iovec()
vmsplice_to_user(): switch to import_iovec()
kill aio_setup_single_vector()
aio: simplify arguments of aio_setup_..._rw()
aio: lift iov_iter_init() into aio_setup_..._rw()
lift iov_iter into {compat_,}do_readv_writev()
NFS: fix BUG() crash in notify_change() with patch to chown_common()
dcache: return -ESTALE not -EBUSY on distributed fs race
NTFS: Version 2.1.32 - Update file write from aio_write to write_iter.
VFS: Add iov_iter_fault_in_multipages_readable()
drop bogus check in file_open_root()
switch security_inode_getattr() to struct path *
constify tomoyo_realpath_from_path()
...
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As execution domain support is gone we can remove
signal translation from the signal code and remove
exec_domain from thread_info.
Signed-off-by: Richard Weinberger <richard@nod.at>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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* pci/enumeration:
PCI: Cleanup control flow
sparc/PCI: Claim bus resources before pci_bus_add_devices()
PCI: Assign resources before drivers claim devices (pci_scan_root_bus())
PCI: Assign resources before drivers claim devices (pci_scan_bus())
* pci/virtualization:
PCI: Add ACS quirks for Intel 1G NICs
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Previously, pci_scan_root_bus() created a root PCI bus, enumerated the
devices on it, and called pci_bus_add_devices(), which made the devices
available for drivers to claim them.
Most callers assigned resources to devices after pci_scan_root_bus()
returns, which may be after drivers have claimed the devices. This is
incorrect; the PCI core should not change device resources while a driver
is managing the device.
Remove pci_bus_add_devices() from pci_scan_root_bus() and do it after any
resource assignment in the callers.
Note that ARM's pci_common_init_dev() already called pci_bus_add_devices()
after pci_scan_root_bus(), so we only need to remove the first call:
pci_common_init_dev
pcibios_init_hw
pci_scan_root_bus
pci_bus_add_devices # first call
pci_bus_assign_resources
pci_bus_add_devices # second call
[bhelgaas: changelog, drop "root_bus" var in alpha common_init_pci(),
return failure earlier in mn10300, add "return" in x86 pcibios_scan_root(),
return early if xtensa platform_pcibios_fixup() fails]
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Richard Henderson <rth@twiddle.net>
CC: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
CC: Matt Turner <mattst88@gmail.com>
CC: David Howells <dhowells@redhat.com>
CC: Tony Luck <tony.luck@intel.com>
CC: Michal Simek <monstr@monstr.eu>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
CC: Sebastian Ott <sebott@linux.vnet.ibm.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: Chris Metcalf <cmetcalf@ezchip.com>
CC: Chris Zankel <chris@zankel.net>
CC: Max Filippov <jcmvbkbc@gmail.com>
CC: Thomas Gleixner <tglx@linutronix.de>
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Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded. Usually, these defines are provided by
<asm-generic/pgtable-nopmd.h> and <asm-generic/pgtable-nopud.h>.
But some architectures fold page table levels in a custom way. They
need to define these macros themself. This patch adds missing defines.
The patch fixes mm->nr_pmds underflow and eliminates dead __pmd_alloc()
and __pud_alloc() on architectures without these page table levels.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: David Howells <dhowells@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pull asm-generic uaccess.h cleanup from Arnd Bergmann:
"Like in 3.19, I once more have a multi-stage cleanup for one
asm-generic header file, this time the work was done by Michael
Tsirkin and cleans up the uaccess.h file in asm-generic, as well as
all architectures for which the respective maintainers did not pick up
his patches directly"
* tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (37 commits)
sparc32: nocheck uaccess coding style tweaks
sparc64: nocheck uaccess coding style tweaks
xtensa: macro whitespace fixes
sh: macro whitespace fixes
parisc: macro whitespace fixes
m68k: macro whitespace fixes
m32r: macro whitespace fixes
frv: macro whitespace fixes
cris: macro whitespace fixes
avr32: macro whitespace fixes
arm64: macro whitespace fixes
arm: macro whitespace fixes
alpha: macro whitespace fixes
blackfin: macro whitespace fixes
sparc64: uaccess_64 macro whitespace fixes
sparc32: uaccess_32 macro whitespace fixes
avr32: whitespace fix
sh: fix put_user sparse errors
metag: fix put_user sparse errors
ia64: fix put_user sparse errors
...
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Now that all in-tree users of strnicmp have been converted to
strncasecmp, the wrapper can be removed.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: David Howells <dhowells@redhat.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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If an attacker can cause a controlled kernel stack overflow, overwriting
the restart block is a very juicy exploit target. This is because the
restart_block is held in the same memory allocation as the kernel stack.
Moving the restart block to struct task_struct prevents this exploit by
making the restart_block harder to locate.
Note that there are other fields in thread_info that are also easy
targets, at least on some architectures.
It's also a decent simplification, since the restart code is more or less
identical on all architectures.
[james.hogan@imgtec.com: metag: align thread_info::supervisor_stack]
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: David Miller <davem@davemloft.net>
Acked-by: Richard Weinberger <richard@nod.at>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Tested-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Chen Liqin <liqin.linux@gmail.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Chris Zankel <chris@zankel.net>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Remove the function search_one_table() that is not used anywhere.
This was partially found by using a static code analysis program called
cppcheck.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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LKP has triggered a compiler warning after my recent patch "mm: account
pmd page tables to the process":
mm/mmap.c: In function 'exit_mmap':
>> mm/mmap.c:2857:2: warning: right shift count >= width of type [enabled by default]
The code:
> 2857 WARN_ON(mm_nr_pmds(mm) >
2858 round_up(FIRST_USER_ADDRESS, PUD_SIZE) >> PUD_SHIFT);
In this, on tile, we have FIRST_USER_ADDRESS defined as 0. round_up() has
the same type -- int. PUD_SHIFT.
I think the best way to fix it is to define FIRST_USER_ADDRESS as unsigned
long. On every arch for consistency.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Merge misc updates from Andrew Morton:
"Bite-sized chunks this time, to avoid the MTA ratelimiting woes.
- fs/notify updates
- ocfs2
- some of MM"
That laconic "some MM" is mainly the removal of remap_file_pages(),
which is a big simplification of the VM, and which gets rid of a *lot*
of random cruft and special cases because we no longer support the
non-linear mappings that it used.
From a user interface perspective, nothing has changed, because the
remap_file_pages() syscall still exists, it's just done by emulating the
old behavior by creating a lot of individual small mappings instead of
one non-linear one.
The emulation is slower than the old "native" non-linear mappings, but
nobody really uses or cares about remap_file_pages(), and simplifying
the VM is a big advantage.
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (78 commits)
memcg: zap memcg_slab_caches and memcg_slab_mutex
memcg: zap memcg_name argument of memcg_create_kmem_cache
memcg: zap __memcg_{charge,uncharge}_slab
mm/page_alloc.c: place zone_id check before VM_BUG_ON_PAGE check
mm: hugetlb: fix type of hugetlb_treat_as_movable variable
mm, hugetlb: remove unnecessary lower bound on sysctl handlers"?
mm: memory: merge shared-writable dirtying branches in do_wp_page()
mm: memory: remove ->vm_file check on shared writable vmas
xtensa: drop _PAGE_FILE and pte_file()-related helpers
x86: drop _PAGE_FILE and pte_file()-related helpers
unicore32: drop pte_file()-related helpers
um: drop _PAGE_FILE and pte_file()-related helpers
tile: drop pte_file()-related helpers
sparc: drop pte_file()-related helpers
sh: drop _PAGE_FILE and pte_file()-related helpers
score: drop _PAGE_FILE and pte_file()-related helpers
s390: drop pte_file()-related helpers
parisc: drop _PAGE_FILE and pte_file()-related helpers
openrisc: drop _PAGE_FILE and pte_file()-related helpers
nios2: drop _PAGE_FILE and pte_file()-related helpers
...
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git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI changes from Bjorn Helgaas:
"Enumeration
- Move domain assignment from arm64 to generic code (Lorenzo Pieralisi)
- ARM: Remove artificial dependency on pci_sys_data domain (Lorenzo Pieralisi)
- ARM: Move to generic PCI domains (Lorenzo Pieralisi)
- Generate uppercase hex for modalias var in uevent (Ricardo Ribalda Delgado)
- Add and use generic config accessors on ARM, PowerPC (Rob Herring)
Resource management
- Free resources on failure in of_pci_get_host_bridge_resources() (Lorenzo Pieralisi)
- Fix infinite loop with ROM image of size 0 (Michel Dänzer)
PCI device hotplug
- Handle surprise add even if surprise removal isn't supported (Bjorn Helgaas)
Virtualization
- Mark AMD/ATI VGA devices that don't reset on D3hot->D0 transition (Alex Williamson)
- Add DMA alias quirk for Adaptec 3405 (Alex Williamson)
- Add Wellsburg (X99) to Intel PCH root port ACS quirk (Alex Williamson)
- Add ACS quirk for Emulex NICs (Vasundhara Volam)
MSI
- Fail MSI-X mappings if there's no space assigned to MSI-X BAR (Yijing Wang)
Freescale Layerscape host bridge driver
- Fix platform_no_drv_owner.cocci warnings (Julia Lawall)
NVIDIA Tegra host bridge driver
- Remove unnecessary tegra_pcie_fixup_bridge() (Lucas Stach)
Renesas R-Car host bridge driver
- Fix error handling of irq_of_parse_and_map() (Dmitry Torokhov)
TI Keystone host bridge driver
- Fix error handling of irq_of_parse_and_map() (Dmitry Torokhov)
- Fix misspelling of current function in debug output (Julia Lawall)
Xilinx AXI host bridge driver
- Fix harmless format string warning (Arnd Bergmann)
Miscellaneous
- Use standard parsing functions for ASPM sysfs setters (Chris J Arges)
- Add pci_device_to_OF_node() stub for !CONFIG_OF (Kevin Hao)
- Delete unnecessary NULL pointer checks (Markus Elfring)
- Add and use defines for PCIe Max_Read_Request_Size (Rafał Miłecki)
- Include clk.h instead of clk-private.h (Stephen Boyd)"
* tag 'pci-v3.20-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (48 commits)
PCI: Add pci_device_to_OF_node() stub for !CONFIG_OF
PCI: xilinx: Convert to use generic config accessors
PCI: xgene: Convert to use generic config accessors
PCI: tegra: Convert to use generic config accessors
PCI: rcar: Convert to use generic config accessors
PCI: generic: Convert to use generic config accessors
powerpc/powermac: Convert PCI to use generic config accessors
powerpc/fsl_pci: Convert PCI to use generic config accessors
ARM: ks8695: Convert PCI to use generic config accessors
ARM: sa1100: Convert PCI to use generic config accessors
ARM: integrator: Convert PCI to use generic config accessors
PCI: versatile: Add DT-based ARM Versatile PB PCIe host driver
ARM: dts: versatile: add PCI controller binding
of/pci: Free resources on failure in of_pci_get_host_bridge_resources()
PCI: versatile: Add DT docs for ARM Versatile PB PCIe driver
PCI: Fail MSI-X mappings if there's no space assigned to MSI-X BAR
r8169: use PCI define for Max_Read_Request_Size
[SCSI] esas2r: use PCI define for Max_Read_Request_Size
tile: use PCI define for Max_Read_Request_Size
rapidio/tsi721: use PCI define for Max_Read_Request_Size
...
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We've replaced remap_file_pages(2) implementation with emulation. Nobody
creates non-linear mapping anymore.
This patch also increase number of bits availble for swap offset.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The core VM already knows about VM_FAULT_SIGBUS, but cannot return a
"you should SIGSEGV" error, because the SIGSEGV case was generally
handled by the caller - usually the architecture fault handler.
That results in lots of duplication - all the architecture fault
handlers end up doing very similar "look up vma, check permissions, do
retries etc" - but it generally works. However, there are cases where
the VM actually wants to SIGSEGV, and applications _expect_ SIGSEGV.
In particular, when accessing the stack guard page, libsigsegv expects a
SIGSEGV. And it usually got one, because the stack growth is handled by
that duplicated architecture fault handler.
However, when the generic VM layer started propagating the error return
from the stack expansion in commit fee7e49d4514 ("mm: propagate error
from stack expansion even for guard page"), that now exposed the
existing VM_FAULT_SIGBUS result to user space. And user space really
expected SIGSEGV, not SIGBUS.
To fix that case, we need to add a VM_FAULT_SIGSEGV, and teach all those
duplicate architecture fault handlers about it. They all already have
the code to handle SIGSEGV, so it's about just tying that new return
value to the existing code, but it's all a bit annoying.
This is the mindless minimal patch to do this. A more extensive patch
would be to try to gather up the mostly shared fault handling logic into
one generic helper routine, and long-term we really should do that
cleanup.
Just from this patch, you can generally see that most architectures just
copied (directly or indirectly) the old x86 way of doing things, but in
the meantime that original x86 model has been improved to hold the VM
semaphore for shorter times etc and to handle VM_FAULT_RETRY and other
"newer" things, so it would be a good idea to bring all those
improvements to the generic case and teach other architectures about
them too.
Reported-and-tested-by: Takashi Iwai <tiwai@suse.de>
Tested-by: Jan Engelhardt <jengelh@inai.de>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> # "s390 still compiles and boots"
Cc: linux-arch@vger.kernel.org
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Some instances of pci_ops initialization rely on the read/write members'
location in the struct. This is fragile and may break when adding new
members to the beginning of the struct.
No functional change.
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: David Howells <dhowells@redhat.com>
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