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authorVegard Nossum <vegard.nossum@gmail.com>2008-11-25 16:55:53 +0100
committerVegard Nossum <vegard.nossum@gmail.com>2009-06-15 15:48:33 +0200
commitb1eeab67682a5e397aecf172046b3a8bd4808ae4 (patch)
treec357b6ac1945dc8beecc2f8c4d84660ad8d35aae /arch/x86
parent9b5cab31897e9e89e36c0c2a89b16b93ff1a971a (diff)
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.h4
-rw-r--r--arch/x86/mm/kmemcheck/shadow.c8
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 602c769fc98..b0783520988 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 e7346d3873b..e773b6bd007 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;