linux-toradex.git/include/asm-generic, branch v4.9-rc3

kconfig.h: remove config_enabled() macro

2016-10-28T01:43:43+00:00

The use of config_enabled() is ambiguous.  For config options,
IS_ENABLED(), IS_REACHABLE(), etc.  will make intention clearer.
Sometimes config_enabled() has been used for non-config options because
it is useful to check whether the given symbol is defined or not.

I have been tackling on deprecating config_enabled(), and now is the
time to finish this work.

Some new users have appeared for v4.9-rc1, but it is trivial to replace
them:

 - arch/x86/mm/kaslr.c
  replace config_enabled() with IS_ENABLED() because
  CONFIG_X86_ESPFIX64 and CONFIG_EFI are boolean.

 - include/asm-generic/export.h
  replace config_enabled() with __is_defined().

Then, config_enabled() can be removed now.

Going forward, please use IS_ENABLED(), IS_REACHABLE(), etc. for config
options, and __is_defined() for non-config symbols.

Link: http://lkml.kernel.org/r/1476616078-32252-1-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada 
Acked-by: Ingo Molnar 
Acked-by: Nicolas Pitre 
Cc: Peter Oberparleiter 
Cc: Arnd Bergmann 
Cc: Kees Cook 
Cc: Michal Marek 
Cc: "H. Peter Anvin" 
Cc: Thomas Gleixner 
Cc: Thomas Garnier 
Cc: Paul Bolle 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild

2016-10-14T21:26:58+00:00

Pull kbuild updates from Michal Marek:

 - EXPORT_SYMBOL for asm source by Al Viro.

   This does bring a regression, because genksyms no longer generates
   checksums for these symbols (CONFIG_MODVERSIONS). Nick Piggin is
   working on a patch to fix this.

   Plus, we are talking about functions like strcpy(), which rarely
   change prototypes.

 - Fixes for PPC fallout of the above by Stephen Rothwell and Nick
   Piggin

 - fixdep speedup by Alexey Dobriyan.

 - preparatory work by Nick Piggin to allow architectures to build with
   -ffunction-sections, -fdata-sections and --gc-sections

 - CONFIG_THIN_ARCHIVES support by Stephen Rothwell

 - fix for filenames with colons in the initramfs source by me.

* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: (22 commits)
  initramfs: Escape colons in depfile
  ppc: there is no clear_pages to export
  powerpc/64: whitelist unresolved modversions CRCs
  kbuild: -ffunction-sections fix for archs with conflicting sections
  kbuild: add arch specific post-link Makefile
  kbuild: allow archs to select link dead code/data elimination
  kbuild: allow architectures to use thin archives instead of ld -r
  kbuild: Regenerate genksyms lexer
  kbuild: genksyms fix for typeof handling
  fixdep: faster CONFIG_ search
  ia64: move exports to definitions
  sparc32: debride memcpy.S a bit
  [sparc] unify 32bit and 64bit string.h
  sparc: move exports to definitions
  ppc: move exports to definitions
  arm: move exports to definitions
  s390: move exports to definitions
  m68k: move exports to definitions
  alpha: move exports to actual definitions
  x86: move exports to actual definitions
  ...

Merge branch 'for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu

2016-10-14T18:46:25+00:00

Pull percpu updates from Tejun Heo:

 - Nick improved generic implementations of percpu operations which
   modify the variable and return so that they calculate the physical
   address only once.

 - percpu_ref percpu <-> atomic mode switching improvements. The
   patchset was originally posted about a year ago but fell through the
   crack.

 - misc non-critical fixes.

* 'for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
  mm/percpu.c: fix potential memory leakage for pcpu_embed_first_chunk()
  mm/percpu.c: correct max_distance calculation for pcpu_embed_first_chunk()
  percpu: eliminate two sparse warnings
  percpu: improve generic percpu modify-return implementation
  percpu-refcount: init ->confirm_switch member properly
  percpu_ref: allow operation mode switching operations to be called concurrently
  percpu_ref: restructure operation mode switching
  percpu_ref: unify staggered atomic switching wait behavior
  percpu_ref: reorganize __percpu_ref_switch_to_atomic() and relocate percpu_ref_switch_to_atomic()
  percpu_ref: remove unnecessary RCU grace period for staggered atomic switching confirmation

Merge branch 'for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata

2016-10-14T18:41:28+00:00

Pull libata updates from Tejun Heo:
 - Write same support added
 - Minor ahci MSIX irq handling updates
 - Non-critical SCSI command translation fixes
 - Controller specific changes

* 'for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  ahci: qoriq: Revert "ahci: qoriq: Disable NCQ on ls2080a SoC"
  libata: remove 
  libata: remove unused definitions from 
  pata_at91: Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR
  ata: Replace BUG() with BUG_ON().
  ata: sata_mv: Replacing dma_pool_alloc and memset with a single call dma_pool_zalloc.
  libata: Some drives failing on SCT Write Same
  ahci: use pci_alloc_irq_vectors
  libata: SCT Write Same handle ATA_DFLAG_PIO
  libata: SCT Write Same / DSM Trim
  libata: Add support for SCT Write Same
  libata: Safely overwrite attached page in WRITE SAME xlat
  ahci: also use a per-port lock for the multi-MSIX case
  ARM: dts: STiH407-family: Add ports-implemented property in sata nodes
  ahci: st: Add ports-implemented property in support
  ahci: qoriq: enable snoopable sata read and write
  ahci: qoriq: adjust sata parameter
  libata-scsi: fix MODE SELECT translation for Control mode page
  libata-scsi: use u8 array to store mode page copy

Merge branch 'work.uaccess2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2016-10-12T06:38:39+00:00

Pull uaccess.h prepwork from Al Viro:
 "Preparations to tree-wide switch to use of linux/uaccess.h (which,
  obviously, will allow to start unifying stuff for real). The last step
  there, ie

    PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*'
    sed -i -e "s!$PATT!#include !" \
            `git grep -l "$PATT"|grep -v ^include/linux/uaccess.h`

  is not taken here - I would prefer to do it once just before or just
  after -rc1.  However, everything should be ready for it"

* 'work.uaccess2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  remove a stray reference to asm/uaccess.h in docs
  sparc64: separate extable_64.h, switch elf_64.h to it
  score: separate extable.h, switch module.h to it
  mips: separate extable.h, switch module.h to it
  x86: separate extable.h, switch sections.h to it
  remove stray include of asm/uaccess.h from cacheflush.h
  mn10300: remove a bogus processor.h->uaccess.h include
  xtensa: split uaccess.h into C and asm sides
  bonding: quit messing with IOCTL
  kill __kernel_ds_p off
  mn10300: finish verify_area() off
  frv: move HAVE_ARCH_UNMAPPED_AREA to pgtable.h
  exceptions: detritus removal

nmi_backtrace: generate one-line reports for idle cpus

2016-10-08T01:46:30+00:00

When doing an nmi backtrace of many cores, most of which are idle, the
output is a little overwhelming and very uninformative.  Suppress
messages for cpus that are idling when they are interrupted and just
emit one line, "NMI backtrace for N skipped: idling at pc 0xNNN".

We do this by grouping all the cpuidle code together into a new
.cpuidle.text section, and then checking the address of the interrupted
PC to see if it lies within that section.

This commit suitably tags x86 and tile idle routines, and only adds in
the minimal framework for other architectures.

Link: http://lkml.kernel.org/r/1472487169-14923-5-git-send-email-cmetcalf@mellanox.com
Signed-off-by: Chris Metcalf 
Acked-by: Peter Zijlstra (Intel) 
Tested-by: Peter Zijlstra (Intel) 
Tested-by: Daniel Thompson  [arm]
Tested-by: Petr Mladek 
Cc: Aaron Tomlin 
Cc: Peter Zijlstra (Intel) 
Cc: "Rafael J. Wysocki" 
Cc: Russell King 
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: move phys_mem_access_prot_allowed() declaration to pgtable.h

2016-10-08T01:46:29+00:00

We get 1 warning when building kernel with W=1:

  drivers/char/mem.c:220:12: warning: no previous prototype for 'phys_mem_access_prot_allowed' [-Wmissing-prototypes]
   int __weak phys_mem_access_prot_allowed(struct file *file,

In fact, its declaration is spreading to several header files in
different architecture, but need to be declare in common header file.

So this patch moves phys_mem_access_prot_allowed() to pgtable.h.

Link: http://lkml.kernel.org/r/1473751597-12139-1-git-send-email-baoyou.xie@linaro.org
Signed-off-by: Baoyou Xie 
Acked-by: Thomas Gleixner 
Acked-by: Ralf Baechle 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

exceptions: detritus removal

2016-09-28T01:15:14+00:00

externs and defines for stuff that is never used

Signed-off-by: Al Viro

percpu: improve generic percpu modify-return implementation

2016-09-22T16:06:53+00:00

Some architectures require an additional load to find the address of
percpu pointers. In some implemenatations, the C aliasing rules do not
allow the result of that load to be kept over the store that modifies
the percpu variable, which causes additional loads.

Work around this by finding the pointer first, then operating on that.

It's also possible to mark things as restrict and those kind of games,
but that can require larger and arch specific changes.

On powerpc, __this_cpu_inc_return compiles to:

        ld 10,48(13)
        ldx 9,3,10
        addi 9,9,1
        stdx 9,3,10
        ld 9,48(13)
        ldx 3,9,3

With this patch it compiles to:

        ld 10,48(13)
        ldx 9,3,10
        addi 9,9,1
        stdx 9,3,10

Signed-off-by: Nicholas Piggin 
To: Tejun Heo 
To: Christoph Lameter 
Cc: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Signed-off-by: Tejun Heo

libata: remove

2016-09-22T15:50:29+00:00

asm-generic is only intended for architecture defaults, and we can simply
kill it off by moving the two defintions directly to .

Signed-off-by: Christoph Hellwig 
Signed-off-by: Tejun Heo