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| author | Vegard Nossum <vegard.nossum@gmail.com> | 2008-11-25 18:55:53 +0300 |
|---|---|---|
| committer | Vegard Nossum <vegard.nossum@gmail.com> | 2009-06-15 17:48:33 +0400 |
| commit | b1eeab67682a5e397aecf172046b3a8bd4808ae4 (patch) | |
| tree | c357b6ac1945dc8beecc2f8c4d84660ad8d35aae /arch/x86 | |
| parent | 9b5cab31897e9e89e36c0c2a89b16b93ff1a971a (diff) | |
| download | linux-b1eeab67682a5e397aecf172046b3a8bd4808ae4.tar.xz | |
kmemcheck: add hooks for the page allocator
This adds support for tracking the initializedness of memory that
was allocated with the page allocator. Highmem requests are not
tracked.
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
[build fix for !CONFIG_KMEMCHECK]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
[rebased for mainline inclusion]
Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/thread_info.h | 4 | ||||
| -rw-r--r-- | arch/x86/mm/kmemcheck/shadow.c | 8 |
2 files changed, 10 insertions, 2 deletions
diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h index 602c769fc98c..b0783520988b 100644 --- a/arch/x86/include/asm/thread_info.h +++ b/arch/x86/include/asm/thread_info.h @@ -154,9 +154,9 @@ struct thread_info { /* thread information allocation */ #ifdef CONFIG_DEBUG_STACK_USAGE -#define THREAD_FLAGS (GFP_KERNEL | __GFP_ZERO) +#define THREAD_FLAGS (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO) #else -#define THREAD_FLAGS GFP_KERNEL +#define THREAD_FLAGS (GFP_KERNEL | __GFP_NOTRACK) #endif #define __HAVE_ARCH_THREAD_INFO_ALLOCATOR diff --git a/arch/x86/mm/kmemcheck/shadow.c b/arch/x86/mm/kmemcheck/shadow.c index e7346d3873b3..e773b6bd0079 100644 --- a/arch/x86/mm/kmemcheck/shadow.c +++ b/arch/x86/mm/kmemcheck/shadow.c @@ -116,6 +116,14 @@ void kmemcheck_mark_uninitialized_pages(struct page *p, unsigned int n) kmemcheck_mark_uninitialized(page_address(&p[i]), PAGE_SIZE); } +void kmemcheck_mark_initialized_pages(struct page *p, unsigned int n) +{ + unsigned int i; + + for (i = 0; i < n; ++i) + kmemcheck_mark_initialized(page_address(&p[i]), PAGE_SIZE); +} + enum kmemcheck_shadow kmemcheck_shadow_test(void *shadow, unsigned int size) { uint8_t *x; |