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2c3cf556b2
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Rik van Riel 2c3cf556b2 x86/mm: Introduce pte_accessible() 
We need pte_present to return true for _PAGE_PROTNONE pages, to indicate that
the pte is associated with a page.

However, for TLB flushing purposes, we would like to know whether the pte
points to an actually accessible page.  This allows us to skip remote TLB
flushes for pages that are not actually accessible.

Fill in this method for x86 and provide a safe (but slower) method
on other architectures.

Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Fixed-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-66p11te4uj23gevgh4j987ip@git.kernel.org
[ Added Linus's review fixes. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-12-11 14:28:34 +00:00
..
alpha alpha: separate thread-synchronous flags 2012-10-24 05:16:45 +03:00
arm Two little fixes, one related to the move to sparse irq and 2012-11-16 16:43:58 +01:00
arm64 arm64: Distinguish between user and kernel XN bits 2012-11-16 15:50:25 +00:00
avr32 Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00
blackfin Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00
c6x Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00
cris Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00
frv frv: fix the broken preempt 2012-11-02 12:08:25 -04:00
h8300 h8300: add missing L1_CACHE_SHIFT 2012-11-09 06:41:47 +01:00
hexagon Hexagon: Copyright marking changes 2012-10-18 17:07:21 -05:00
ia64 revert "mm: fix-up zone present pages" 2012-11-16 14:33:04 -08:00
m32r Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00
m68k m68k: Wire up kcmp 2012-10-19 17:49:37 +02:00
microblaze Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00
mips mips, arc: fix build failure 2012-11-16 14:33:04 -08:00
mn10300 UAPI: Make arch/mn10300/include/uapi/asm/setup.h non-empty 2012-10-17 12:32:35 +01:00
openrisc Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00
parisc UAPI: (Scripted) Disintegrate arch/parisc/include/asm 2012-10-16 21:28:05 +01:00
powerpc cpuidle/powerpc: Fix snooze state problem in the cpuidle design on pseries. 2012-10-18 10:57:25 +11:00
s390 s390/mm: have 16 byte aligned struct pages 2012-11-13 11:03:09 +01:00
score Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00
sh UAPI: Make arch/sh/include/uapi/asm/hw_breakpoint.h non-empty 2012-10-17 12:32:35 +01:00
sparc sparc64: Fix build with mix of modular vs. non-modular crypto drivers. 2012-11-09 20:55:16 -08:00
tile arch/tile: avoid build warnings from duplicate ELF_R_xxx #defines 2012-10-23 10:22:48 -04:00
um Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2012-10-13 10:05:52 +09:00
unicore32 arch/unicore32: remove CONFIG_EXPERIMENTAL 2012-11-09 17:30:10 +08:00
x86 x86/mm: Introduce pte_accessible() 2012-12-11 14:28:34 +00:00
xtensa xtensa: switch to generic sys_execve() 2012-10-25 15:00:44 -07:00
.gitignore
Kconfig Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00