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2008-06-12x86, lockdep: fix "WARNING: at kernel/lockdep.c:2658 check_flags+0x4c/0x128()"Vegard Nossum
Alessandro Suardi reported: > Recently upgraded my FC6 desktop to Fedora 9; with the > latest nautilus RPM updates my VNC session went nuts > with nautilus pegging the CPU for everything that breathed. > > I now reverted to an earlier nautilus package, but during > the peak CPU period my kernel spat this: > > [314185.623294] ------------[ cut here ]------------ > [314185.623414] WARNING: at kernel/lockdep.c:2658 check_flags+0x4c/0x128() > [314185.623514] Modules linked in: iptable_filter ip_tables x_tables > sunrpc ipv6 fuse snd_via82xx snd_ac97_codec ac97_bus snd_mpu401_uart > snd_rawmidi via686a hwmon parport_pc sg parport uhci_hcd ehci_hcd > [314185.623924] Pid: 12314, comm: nautilus Not tainted 2.6.26-rc5-git2 #4 > [314185.624021] [<c0115b95>] warn_on_slowpath+0x41/0x7b > [314185.624021] [<c010de70>] ? do_page_fault+0x2c1/0x5fd > [314185.624021] [<c0128396>] ? up_read+0x16/0x28 > [314185.624021] [<c010de70>] ? do_page_fault+0x2c1/0x5fd > [314185.624021] [<c012fa33>] ? __lock_acquire+0xbb4/0xbc3 > [314185.624021] [<c012d0a0>] check_flags+0x4c/0x128 > [314185.624021] [<c012fa73>] lock_acquire+0x31/0x7d > [314185.624021] [<c0128cf6>] __atomic_notifier_call_chain+0x30/0x80 > [314185.624021] [<c0128cc6>] ? __atomic_notifier_call_chain+0x0/0x80 > [314185.624021] [<c0128d52>] atomic_notifier_call_chain+0xc/0xe > [314185.624021] [<c0128d81>] notify_die+0x2d/0x2f > [314185.624021] [<c01043b0>] do_int3+0x1f/0x4d > [314185.624021] [<c02f2d3b>] int3+0x27/0x2c > [314185.624021] ======================= > [314185.624021] ---[ end trace 1923f65a2d7bb246 ]--- > [314185.624021] possible reason: unannotated irqs-off. > [314185.624021] irq event stamp: 488879 > [314185.624021] hardirqs last enabled at (488879): [<c0102d67>] > restore_nocheck+0x12/0x15 > [314185.624021] hardirqs last disabled at (488878): [<c0102dca>] > work_resched+0x19/0x30 > [314185.624021] softirqs last enabled at (488876): [<c011a1ba>] > __do_softirq+0xa6/0xac > [314185.624021] softirqs last disabled at (488865): [<c010476e>] > do_softirq+0x57/0xa6 > > I didn't seem to find it with some googling, so here it is. > > I was incidentally ltracing that process to try and find out > what was gulping down that much CPU (sorry, no idea > whether ltrace and the WARNING happened at the same > time or which came first) and: Yeah, this is extremely likely to be the source of the warning. The warning should be harmless, however. > Box is my trusty noname K7-800, 512MB RAM; if there's > anything else useful I might be able to provide, just ask. It would be interesting to see where the int3 comes from. Too bad, lockdep doesn't provide the register dump. The stacktrace also doesn't go further than the int3(), I wonder if this int3 came from userspace? The ltrace readme says "software breakpoints, like gdb", so I guess this is the case. Yep, seems like it. This looks relevant: | commit fb1dac909d94ff807cd833d340c6827c3a957159 | Author: Peter Zijlstra <a.p.zijlstra@chello.nl> | Date: Wed Jan 16 09:51:59 2008 +0100 | | lockdep: more hardirq annotations for notify_die() I'm attaching a similarly-looking patch for this case (DO_VM86_ERROR), though I suspect it might be missing for the other cases (DO_ERROR/DO_ERROR_INFO) as well. Reported-by: Alessandro Suardi <alessandro.suardi@gmail.com> Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-12x86: fix an incompatible pointer type warning on 64-bit compilationsDavid Howells
Fix an incompatible pointer type warning on x86_64 compilations. early_memtest() is passing a u64* to find_e820_area_size() which is expecting an unsigned long. Change t_start and t_size to unsigned long as those are also 64-bit types on x88_64. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-12x86: fix lockdep warning during suspend-to-ramPeter Zijlstra
Andrew Morton wrote: > I've been seeing the below for a long time during suspend-to-ram on the Vaio. > > > PM: Syncing filesystems ... done. > PM: Preparing system for mem sleep > Freezing user space processes ... <4>------------[ cut here ]------------ > WARNING: at kernel/lockdep.c:2658 check_flags+0x4c/0x127() > Modules linked in: i915 drm ipw2200 sonypi ipv6 autofs4 hidp l2cap bluetooth sunrpc nf_conntrack_netbios_ns ipt_REJECT nf_conntrack_ipv4 xt_state nf_conntrack xt_tcpudp iptable_filter ip_tables x_tables acpi_cpufreq nvram ohci1394 ieee1394 ehci_hcd uhci_hcd sg joydev snd_hda_intel snd_seq_dummy sr_mod snd_seq_oss cdrom snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss ieee80211 pcspkr ieee80211_crypt snd_pcm i2c_i801 snd_timer i2c_core ide_pci_generic piix snd soundcore snd_page_alloc button ext3 jbd ide_disk ide_core [last unloaded: ipw2200] > Pid: 3250, comm: zsh Not tainted 2.6.26-rc5 #1 > [<c011c5f5>] warn_on_slowpath+0x41/0x6d > [<c01080e6>] ? native_sched_clock+0x82/0x96 > [<c013789c>] ? mark_held_locks+0x41/0x5c > [<c0315688>] ? _spin_unlock_irqrestore+0x36/0x58 > [<c0137a29>] ? trace_hardirqs_on+0xe6/0x10d > [<c0138637>] ? __lock_acquire+0xae3/0xb2b > [<c0313413>] ? schedule+0x39b/0x3b4 > [<c0135596>] check_flags+0x4c/0x127 > [<c01386b9>] lock_acquire+0x3a/0x86 > [<c0315075>] _spin_lock+0x26/0x53 > [<c0140660>] ? refrigerator+0x13/0xc3 > [<c0140660>] refrigerator+0x13/0xc3 > [<c012684a>] get_signal_to_deliver+0x3c/0x31e > [<c0102fe7>] do_notify_resume+0x91/0x6ee > [<c01359fd>] ? lock_release_holdtime+0x50/0x56 > [<c0315688>] ? _spin_unlock_irqrestore+0x36/0x58 > [<c0235d24>] ? read_chan+0x0/0x58c > [<c0137a29>] ? trace_hardirqs_on+0xe6/0x10d > [<c0315694>] ? _spin_unlock_irqrestore+0x42/0x58 > [<c0230afa>] ? tty_ldisc_deref+0x5c/0x63 > [<c0233104>] ? tty_read+0x66/0x98 > [<c014b3f0>] ? audit_syscall_exit+0x2aa/0x2c5 > [<c0109430>] ? do_syscall_trace+0x6b/0x16f > [<c0103a9c>] work_notifysig+0x13/0x1b > ======================= > ---[ end trace 25b49fe59a25afa5 ]--- > possible reason: unannotated irqs-off. > irq event stamp: 58919 > hardirqs last enabled at (58919): [<c0103afd>] syscall_exit_work+0x11/0x26 Joy - I so love entry.S Best I can make of it: syscall_exit_work resume_userspace DISABLE_INTERRUPTS (no TRACE_IRQS_OFF) work_pending work_notifysig do_notify_resume() do_signal() get_signal_to_deliver() try_to_freeze() refrigerator() task_lock() -> check_flags() -> BANG The normal path is: syscall_exit_work resume_userspace DISABLE_INTERRUPTS restore_all TRACE_IRQS_IRET iret No idea why that would not warn.. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-12x86: fix unused variable 'loops' warning in arch/x86/boot/a20.cManish Katiyar
Following patch fixes the below warning message : arch/x86/boot/a20.c:118: warning: unused variable 'loops' Signed-off-by : Manish Katiyar <mkatiyar@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-12Revert "x86: fix ioapic bug again"Ingo Molnar
This reverts commit 6e908947b4995bc0e551a8257c586d5c3e428201. Németh Márton reported: | there is a problem in 2.6.26-rc3 which was not there in case of | 2.6.25: the CPU wakes up ~90,000 times per sec instead of ~60 per sec. | | I also "git bisected" the problem, the result is: | | 6e908947b4995bc0e551a8257c586d5c3e428201 is first bad commit | commit 6e908947b4995bc0e551a8257c586d5c3e428201 | Author: Ingo Molnar <mingo@elte.hu> | Date: Fri Mar 21 14:32:36 2008 +0100 | | x86: fix ioapic bug again the original problem is fixed by Maciej W. Rozycki in the tip/x86/apic branch (confirmed by Márton), but those changes are too intrusive for v2.6.26 so we'll go for the less intrusive (repeated) revert now. Reported-and-bisected-by: Németh Márton <nm127@freemail.hu> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-12x86: fix asm warning in head_32.SJoe Korty
On Mon, May 19, 2008 at 04:10:02PM -0700, Linus Torvalds wrote: > It also causes these warnings on 32-bit PAE: > > AS arch/x86/kernel/head_32.o > arch/x86/kernel/head_32.S: Assembler messages: > arch/x86/kernel/head_32.S:225: Warning: left operand is a bignum; integer 0 assumed > arch/x86/kernel/head_32.S:609: Warning: left operand is a bignum; integer 0 assumed > > and I do not see why (the end result seems to be identical). Fix head_32.S gcc bignum warnings when CONFIG_PAE=y. arch/x86/kernel/head_32.S: Assembler messages: arch/x86/kernel/head_32.S:225: Warning: left operand is a bignum; integer 0 assumed arch/x86/kernel/head_32.S:609: Warning: left operand is a bignum; integer 0 assumed The assembler was stumbling over the 64-bit constant 0x100000000 in the KPMDS #define. Testing: a cmp(1) on head_32.o before and after shows the binary is unchanged. Signed-off-by: Joe Korty <joe.korty@ccur.com Cc: Hugh Dickins <hugh@veritas.com> Cc: Theodore Tso <tytso@mit.edu> Cc: Gabriel C <nix.or.die@googlemail.com> Cc: Keith Packard <keithp@keithp.com> Cc: "Pallipadi Venkatesh" <venkatesh.pallipadi@intel.com> Cc: Eric Anholt <eric@anholt.net> Cc: "Siddha Suresh B" <suresh.b.siddha@intel.com> Cc: bugme-daemon@bugzilla.kernel.org Cc: airlied@linux.ie Cc: "Barnes Jesse" <jesse.barnes@intel.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-12x86: fix endless page faults in mount_block_root for Linux 2.6Henry Nestler
Page faults in kernel address space between PAGE_OFFSET up to VMALLOC_START should not try to map as vmalloc. Fix rarely endless page faults inside mount_block_root for root filesystem at boot time. All 32bit kernels up to 2.6.25 can fail into this hole. I can not present this under native linux kernel. I see, that the 64bit has fixed the problem. I copied the same lines into 32bit part. Recorded debugs are from coLinux kernel 2.6.22.18 (virtualisation): http://www.henrynestler.com/colinux/testing/pfn-check-0.7.3/20080410-antinx/bug16-recursive-page-fault-endless.txt The physicaly memory was trimmed down to 192MB to better catch the bug. More memory gets the bug more rarely. Details, how every x86 32bit system can fail: Start from "mount_block_root", http://lxr.linux.no/linux/init/do_mounts.c#L297 There the variable "fs_names" got one memory page with 4096 bytes. Variable "p" walks through the existing file system types. The first string is no problem. But, with the second loop in mount_block_root the offset of "p" is not at beginning of page, the offset is for example +9, if "reiserfs" is the first in list. Than calls do_mount_root, and lands in sys_mount. Remember: Variable "type_page" contains now "fs_type+9" and not contains a full page. The sys_mount copies 4096 bytes with function "exact_copy_from_user()": http://lxr.linux.no/linux/fs/namespace.c#L1540 Mostly exist pages after the buffer "fs_names+4096+9" and the page fault handler was not called. No problem. In the case, if the page after "fs_names+4096" is not mapped, the page fault handler was called from http://lxr.linux.no/linux/fs/namespace.c#L1320 The do_page_fault gots an address 0xc03b4000. It's kernel address, address >= TASK_SIZE, but not from vmalloc! It's from "__getname()" alias "kmem_cache_alloc". The "error_code" is 0. "vmalloc_fault" will be call: http://lxr.linux.no/linux/arch/i386/mm/fault.c#L332 "vmalloc_fault" tryed to find the physical page for a non existing virtual memory area. The macro "pte_present" in vmalloc_fault() got a next page fault for 0xc0000ed0 at: http://lxr.linux.no/linux/arch/i386/mm/fault.c#L282 No PTE exist for such virtual address. The page fault handler was trying to sync the physical page for the PTE lockup. This called vmalloc_fault() again for address 0xc000000, and that also was not existing. The endless began... In normal case the cpu would still loop with disabled interrrupts. Under coLinux this was catched by a stack overflow inside printk debugs. Signed-off-by: Henry Nestler <henry.nestler@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-06-12geode: fix modular buildIngo Molnar
-tip testing found this build bug: MODPOST 331 modules ERROR: "geode_mfgpt_toggle_event" [drivers/watchdog/geodewdt.ko] undefined! ERROR: "geode_mfgpt_alloc_timer" [drivers/watchdog/geodewdt.ko] undefined! make[1]: *** [__modpost] Error 1 make: *** [modules] Error 2 with this config: http://redhat.com/~mingo/misc/config-Wed_Jun__4_18_01_59_CEST_2008.bad export those symbols. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-09Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6: Blackfin serial driver: fix up tty core set_ldisc API change breakage bug Blackfin arch: protect only the SPI bus controller with CONFIG_SPI_BFIN Blackfin arch: fixup warnings with the new cplb saved values Blackfin Serial Driver: Clean up BF54x macro in blackfin UART driver.
2008-06-09Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: [POWERPC] ehea: Remove dependency on MEMORY_HOTPLUG [POWERPC] Make walk_memory_resource available with MEMORY_HOTPLUG=n [POWERPC] Use dev_set_name in pci_64.c [POWERPC] Fix incorrect enabling of VMX when building signal or user context [POWERPC] boot/Makefile CONFIG_ variable fixes
2008-06-09sh: Add -mno-fdpic to default flags.Paul Mundt
Presently the --fdpic specifier and the --isa matching clash when building with FDPIC toolchains. As we have no interest in building the kernel with --fdpic in the first place, always try to add in -mno-fdpic to the default flags. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-06-09sh: add resource of USB host for SH7723Yoshihiro Shimoda
Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-06-09sh: Fix compile error SH7763 setup codeNobuhiro Iwamatsu
SH7763's setup code use old DECLARE_INTC_DESC. There was a compile error because of this. Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-06-09sh: Add SH7723 SCIF supportYusuke.Goda
Signed-off-by: Yusuke Goda <goda.yusuke@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-06-09[POWERPC] Make walk_memory_resource available with MEMORY_HOTPLUG=nNathan Lynch
The ehea driver was recently changed[1] to use walk_memory_resource() to detect the system's memory layout. However, walk_memory_resource() is available only when memory hotplug is enabled. So CONFIG_EHEA was made to depend on MEMORY_HOTPLUG [2], but it is inappropriate for a network driver to have such a dependency. Make the declaration of walk_memory_resource() and its powerpc implementation (ehea is powerpc-specific) unconditionally available. [1] 48cfb14f8b89d4d5b3df6c16f08b258686fb12ad "ehea: Add DLPAR memory remove support" [2] fb7b6ca2b6b7c23b52be143bdd5f55a23b9780c8 "ehea: Add dependency to Kconfig" Signed-off-by: Nathan Lynch <ntl@pobox.com> Acked-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-09[POWERPC] Use dev_set_name in pci_64.cStephen Rothwell
During the next merge window, pci_name()'s return value will become const, so use the new dev_set_name() instead to avoid the warning (from linux-next): arch/powerpc/kernel/pci_64.c: In function 'of_create_pci_dev': arch/powerpc/kernel/pci_64.c:193: warning: passing argument 1 of 'sprintf' discards qualifiers from pointer target type Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-09[POWERPC] Fix incorrect enabling of VMX when building signal or user contextBenjamin Herrenschmidt
When building a signal or a ucontext, we can incorrectly set the MSR_VEC bit of the kernel pt_regs->msr before returning to userspace if the task -ever- used VMX. This can lead to funny result if that stack used it in the past, then "lost" it (ie. it wasn't enabled after a context switch for example) and then called get_context. It can end up with VMX enabled and the registers containing values from some other task. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-09[POWERPC] boot/Makefile CONFIG_ variable fixesAdrian Bunk
This corrects the names of two CONFIG_ variables. Note that the CONFIG_MPC86XADS fix uncovers another bug (with mpc866_ads_defconfig) that will require fixing: <-- snip --> ... arch/powerpc/boot/dtc -O dtb -o arch/powerpc/boot/mpc866ads.dtb -b 0 /home/bunk/linux/kernel-2.6/git/linux-2.6/arch/powerpc/boot/dts/mpc866ads.dts DTC: dts->dtb on file "/home/bunk/linux/kernel-2.6/git/linux-2.6/arch/powerpc/boot/dts/mpc866ads.dts" WRAP arch/powerpc/boot/cuImage.mpc866ads powerpc64-linux-ld: arch/powerpc/boot/cuboot-mpc866ads.o: No such file: No such file or directory make[2]: *** [arch/powerpc/boot/cuImage.mpc866ads] Error 1 <-- snip --> Reported-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-07Blackfin arch: protect only the SPI bus controller with CONFIG_SPI_BFINMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-06-06Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: x86/PCI: add workaround for bug in ASUS A7V600 BIOS (rev 1005) PCI/x86: fix up PCI stuff so that PCI_GOANY supports OLPC
2008-06-06rtc-ds1374: rename device to just "ds1374"Jean Delvare
Change the name of the device from "rtc-ds1374" to just "ds1374", to match what all other RTC drivers do. I seem to remember that this name was chosen to avoid possible confusion with an older ds1374 driver, but that driver was removed 3 months ago. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Acked-by: Kumar Gala <galak@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-06Fix various old email addresses for dwmw2David Woodhouse
Although if people have questions about ARCnet, perhaps it's _better_ for them to be mailing dwmw2@cam.ac.uk about it... Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-06uml: PATH_MAX needs limits.hIngo Molnar
Include limits.h to get a definition of PATH_MAX. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-06uml: stub needs to tolerate SIGWINCHJeff Dike
We lost the marking of SIGWINCH as being OK to receive during stub execution, causing a panic should that happen. Cc: Benedict Verheyen <benedict.verheyen@gmail.com> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-06uml: memcpy export needs to follow host declarationJeff Dike
x86_64 defines either memcpy or __memcpy depending on the gcc version, and it looks like UML needs to follow that in its exporting. Cc: Gabriel C <nix.or.die@googlemail.com> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-06uml: deal with inaccessible address space startTom Spink
This patch makes os_get_task_size locate the bottom of the address space, as well as the top. This is for systems which put a lower limit on mmap addresses. It works by manually scanning pages from zero onwards until a valid page is found. Because the bottom of the address space may not be zero, it's not sufficient to assume the top of the address space is the size of the address space. The size is the difference between the top address and bottom address. [jdike@addtoit.com: changed the name to reflect that this function is supposed to return the top of the process address space, not its size and changed the return value to reflect that. Also some minor formatting changes] Signed-off-by: Tom Spink <tspink@gmail.com> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-06uml: remove a duplicate includeHuang Weiyi
Removed duplicated include file "kern_util.h" in arch/um/drivers/ubd_kern.c. Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-06uml: deal with host time going backwardsJeff Dike
Protection against the host's time going backwards (eg, ntp activity on the host) by keeping track of the time at the last tick and if it's greater than the current time, keep time stopped until the host catches up. Cc: Nix <nix@esperi.org.uk> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-06m68k: enable CONFIG_COMPAT_BRK by defaultGeert Uytterhoeven
As some m68k machines have plenty of libc5 binaries in active use, enable CONFIG_COMPAT_BRK by default. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-05Merge master.kernel.org:/home/rmk/linux-2.6-armtip-x86-idle-2008-06-16_09.18_MonLinus Torvalds
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] pxa: fix tosa.c build error [ARM] 5067/1: _raw_write_can_lock macro bugfix [ARM] 5070/1: pxa: add GPIO104_PSKTSEL to pxa27x MFP configuration [ARM] 5068/1: PXA2xx Additional gpio definitions [ARM] 5066/2: EM-X270: Fix DM9000 IRQ flags initialisation [ARM] 5065/2: CM-X270: Fix DM9000 IRQ flags initialisation [ARM] 5062/1: pxa: remove unused definition of CONFIG_ARCH_COTULLA_IDP [ARM] 5060/1: remove unnecessary include of asm/io.h [ARM] fix AT91 include loops
2008-06-05x86/PCI: add workaround for bug in ASUS A7V600 BIOS (rev 1005)Bertram Felgenhauer
This BIOS claims the VIA 8237 south bridge to be compatible with VIA 586, which it is not. Without this patch, I get the following warning while booting, among others, | PCI: Using IRQ router VIA [1106/3227] at 0000:00:11.0 | ------------[ cut here ]------------ | WARNING: at arch/x86/pci/irq.c:265 pirq_via586_get+0x4a/0x60() | Modules linked in: | Pid: 1, comm: swapper Not tainted 2.6.26-rc4-00015-g1ec7d99 #1 | [<c0119fd4>] warn_on_slowpath+0x54/0x70 | [<c02246e0>] ? vt_console_print+0x210/0x2b0 | [<c02244d0>] ? vt_console_print+0x0/0x2b0 | [<c011a413>] ? __call_console_drivers+0x43/0x60 | [<c011a482>] ? _call_console_drivers+0x52/0x80 | [<c011aa89>] ? release_console_sem+0x1c9/0x200 | [<c0291d21>] ? raw_pci_read+0x41/0x70 | [<c0291e8f>] ? pci_read+0x2f/0x40 | [<c029151a>] pirq_via586_get+0x4a/0x60 | [<c02914d0>] ? pirq_via586_get+0x0/0x60 | [<c029178d>] pcibios_lookup_irq+0x15d/0x430 | [<c03b895a>] pcibios_irq_init+0x17a/0x3e0 | [<c03a66f0>] ? kernel_init+0x0/0x250 | [<c03a6763>] kernel_init+0x73/0x250 | [<c03b87e0>] ? pcibios_irq_init+0x0/0x3e0 | [<c0114d00>] ? schedule_tail+0x10/0x40 | [<c0102dee>] ? ret_from_fork+0x6/0x1c | [<c03a66f0>] ? kernel_init+0x0/0x250 | [<c03a66f0>] ? kernel_init+0x0/0x250 | [<c010324b>] kernel_thread_helper+0x7/0x1c | ======================= | ---[ end trace 4eaa2a86a8e2da22 ]--- and IRQ trouble later, | irq 10: nobody cared (try booting with the "irqpoll" option) Now that's an VIA 8237 chip, so pirq_via586_get shouldn't be called at all; adding this workaround to via_router_probe() fixes the problem for me. Amazingly I have a 2.6.23.8 kernel that somehow works fine ... I'll never understand why. Signed-off-by: Bertram Felgenhauer <int-e@gmx.de> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2008-06-05Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: Fix divide by zero error in build_clear_page() and build_copy_page() [MIPS] Fix typo in header guard [MIPS] Fix build error - Delete debugging crap that crept in with CMP [MIPS] Add accessors for random register. [MIPS] IP27: misc fixes [MIPS] IP27: Fix clockevent setup [MIPS] IP27: Fix bootmem memory setup [MIPS] remove CONFIG_CPU_R4000 line from Makefile [MIPS] Fix check for valid stack pointer during backtrace [MIPS] Add missing braces to pte_mkyoung [MIPS] R4700: Fix build_tlb_probe_entry [MIPS] Alchemy: dbdma: add API to delete custom DDMA device ids. [MIPS] Alchemy: export get_au1x00_speed for modules
2008-06-05PCI/x86: fix up PCI stuff so that PCI_GOANY supports OLPCAndres Salomon
Previously, one would have to specifically choose CONFIG_OLPC and CONFIG_PCI_GOOLPC in order to enable PCI_OLPC. That doesn't really work for distro kernels, so this patch allows one to choose CONFIG_OLPC and CONFIG_PCI_GOANY in order to build in OLPC support in a generic kernel (as requested by Robert Millan). This also moves GOOLPC before GOANY in the menuconfig list. Finally, make pci_access_init return early if we detect OLPC hardware. There's no need to continue probing stuff, and pci_pcbios_init specifically trashes our settings (we didn't run into that before because PCI_GOANY wasn't supported). Signed-off-by: Andres Salomon <dilinger@debian.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2008-06-05x86: fix CONFIG_NONPROMISC_DEVMEM prompt and help textStefan Richter
Here is an attempt to translate the prompt and help text into something which is legible and, as a bonus, correct. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-05Fix divide by zero error in build_clear_page() and build_copy_page()Yoichi Yuasa
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-06-05[MIPS] Fix build error - Delete debugging crap that crept in with CMPRalf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-06-05[MIPS] IP27: misc fixesThomas Bogendoerfer
- fix PCI interrupt assignment by emulating ioc3 interrupt pin register - use pci_probe_only mode - select correct page size in bridge - remove no longer needed ioc3_sio_init() code [Ralf: Fix for 64kB or larger pagesizes] Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-06-05[MIPS] IP27: Fix clockevent setupThomas Bogendoerfer
Fix breakage introduced by converting hub_rt to clockevent. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-06-05[MIPS] IP27: Fix bootmem memory setupThomas Bogendoerfer
Changes in the generic bootmem code broke memory setup for IP27. This patch fixes this by replacing lots of special IP27 code with generic bootmon code. This has been tested only on a single node. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-06-05[MIPS] remove CONFIG_CPU_R4000 line from MakefileAdrian Bunk
The existing options are named CONFIG_CPU_R4300 and CONFIG_CPU_R4X00, and they are directly below. Reported-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-06-05[MIPS] Fix check for valid stack pointer during backtraceThomas Bogendoerfer
The newly added check for valid stack pointer address breaks at least for 64bit kernels. Use __get_user() for accessing stack content to avoid crashes, when doing the backtrace. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-06-05[MIPS] R4700: Fix build_tlb_probe_entryThomas Bogendoerfer
Treat R4700 like R4600 in build_tlb_probe_entry. Without this fix kernel will lock up. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-06-05[MIPS] Alchemy: dbdma: add API to delete custom DDMA device ids.Manuel Lauss
Add API to delete custom DDMA device ids create with au1xxx_ddma_device_add(). Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-06-05[MIPS] Alchemy: export get_au1x00_speed for modulesManuel Lauss
au1xmmc.c driver depends on it, so export it for modules. Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-06-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc: switch /proc/led to seq_file sparc64: IO accessors fix
2008-06-04Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip: x86, fpu: fix CONFIG_PREEMPT=y corruption of application's FPU stack suspend-vs-iommu: prevent suspend if we could not resume x86: section mismatch fix x86: fix Xorg crash with xf86MapVidMem error x86: fix pointer type warning in arch/x86/mm/init_64.c:early_memtest x86: fix bad pmd ffff810000207xxx(9090909090909090) x86: ioremap fix failing nesting check x86: fix broken math-emu with lazy allocation of fpu area x86: enable preemption in delay x86: disable preemption in native_smp_prepare_cpus x86: fix APIC warning on 32bit v2
2008-06-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6.26Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6.26: sh: Add defconfig for RSK7203. sh: Update SE7206 defconfig. sh: Disable 4KSTACKS on nommu. sh: fix miscompilation of ip_fast_csum with gcc >= 4.3 sh: module.c use kernel unaligned helpers sh/kernel/cpu/irq/intc-sh5.c build fix
2008-06-04celleb_scc_pciex endianness misannotationsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-04mpc52xx_gpio iomem annotationsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-04x86, fpu: fix CONFIG_PREEMPT=y corruption of application's FPU stackSuresh Siddha
Jürgen Mell reported an FPU state corruption bug under CONFIG_PREEMPT, and bisected it to commit v2.6.19-1363-gacc2076, "i386: add sleazy FPU optimization". Add tsk_used_math() checks to prevent calling math_state_restore() which can sleep in the case of !tsk_used_math(). This prevents making a blocking call in __switch_to(). Apparently "fpu_counter > 5" check is not enough, as in some signal handling and fork/exec scenarios, fpu_counter > 5 and !tsk_used_math() is possible. It's a side effect though. This is the failing scenario: process 'A' in save_i387_ia32() just after clear_used_math() Got an interrupt and pre-empted out. At the next context switch to process 'A' again, kernel tries to restore the math state proactively and sees a fpu_counter > 0 and !tsk_used_math() This results in init_fpu() during the __switch_to()'s math_state_restore() And resulting in fpu corruption which will be saved/restored (save_i387_fxsave and restore_i387_fxsave) during the remaining part of the signal handling after the context switch. Bisected-by: Jürgen Mell <j.mell@t-online.de> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Tested-by: Jürgen Mell <j.mell@t-online.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@kernel.org
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