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mm: introduce kmemleak_update_trace()

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The memory allocation stack trace is not always useful for debugging a
memory leak (e.g.  radix_tree_preload).  This function, when called,
updates the stack trace for an already allocated object.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Catalin Marinas
2014-06-06 14:38:17 -07:00
committed by Linus Torvalds
parent aae0ad7ae5
commit ffe2c748e2
3 changed files with 39 additions and 0 deletions
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4
include/linux/kmemleak.h
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@@ -30,6 +30,7 @@ extern void kmemleak_alloc_percpu(const void __percpu *ptr, size_t size) __ref;
extern void kmemleak_free(const void *ptr) __ref;
extern void kmemleak_free_part(const void *ptr, size_t size) __ref;
extern void kmemleak_free_percpu(const void __percpu *ptr) __ref;
extern void kmemleak_update_trace(const void *ptr) __ref;
extern void kmemleak_not_leak(const void *ptr) __ref;
extern void kmemleak_ignore(const void *ptr) __ref;
extern void kmemleak_scan_area(const void *ptr, size_t size, gfp_t gfp) __ref;
@@ -83,6 +84,9 @@ static inline void kmemleak_free_recursive(const void *ptr, unsigned long flags)
static inline void kmemleak_free_percpu(const void __percpu *ptr)
{
}
static inline void kmemleak_update_trace(const void *ptr)
{
}
static inline void kmemleak_not_leak(const void *ptr)
{
}