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authorPekka Enberg <penberg@cs.helsinki.fi>2006-02-01 03:05:52 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-01 08:53:18 -0800
commit7fd6b1413082c303613fc137aca9a004740cacf0 (patch)
tree3186f4fdecbda4f16558c393a05408f7d3799ad4 /mm/slab.c
parentb958f7d9f35bfb61625f201cd92a3fc39504af7a (diff)
[PATCH] slab: fix kzalloc and kstrdup caller report for CONFIG_DEBUG_SLAB
Fix kzalloc() and kstrdup() caller report for CONFIG_DEBUG_SLAB. We must pass the caller to __cache_alloc() instead of directly doing __builtin_return_address(0) there; otherwise kzalloc() and kstrdup() are reported as the allocation site instead of the real one. Thanks to Valdis Kletnieks for reporting the problem and Steven Rostedt for the original idea. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/slab.c')
-rw-r--r--mm/slab.c29
1 files changed, 24 insertions, 5 deletions
diff --git a/mm/slab.c b/mm/slab.c
index 6fbd6a1cdeb4..67527268b01c 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2687,7 +2687,8 @@ static inline void *____cache_alloc(struct kmem_cache *cachep, gfp_t flags)
return objp;
}
-static inline void *__cache_alloc(struct kmem_cache *cachep, gfp_t flags)
+static __always_inline void *
+__cache_alloc(struct kmem_cache *cachep, gfp_t flags, void *caller)
{
unsigned long save_flags;
void *objp;
@@ -2698,7 +2699,7 @@ static inline void *__cache_alloc(struct kmem_cache *cachep, gfp_t flags)
objp = ____cache_alloc(cachep, flags);
local_irq_restore(save_flags);
objp = cache_alloc_debugcheck_after(cachep, flags, objp,
- __builtin_return_address(0));
+ caller);
prefetchw(objp);
return objp;
}
@@ -2927,7 +2928,7 @@ static inline void __cache_free(struct kmem_cache *cachep, void *objp)
*/
void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags)
{
- return __cache_alloc(cachep, flags);
+ return __cache_alloc(cachep, flags, __builtin_return_address(0));
}
EXPORT_SYMBOL(kmem_cache_alloc);
@@ -3041,7 +3042,8 @@ EXPORT_SYMBOL(kmalloc_node);
* platforms. For example, on i386, it means that the memory must come
* from the first 16MB.
*/
-void *__kmalloc(size_t size, gfp_t flags)
+static __always_inline void *__do_kmalloc(size_t size, gfp_t flags,
+ void *caller)
{
struct kmem_cache *cachep;
@@ -3053,10 +3055,27 @@ void *__kmalloc(size_t size, gfp_t flags)
cachep = __find_general_cachep(size, flags);
if (unlikely(cachep == NULL))
return NULL;
- return __cache_alloc(cachep, flags);
+ return __cache_alloc(cachep, flags, caller);
+}
+
+#ifndef CONFIG_DEBUG_SLAB
+
+void *__kmalloc(size_t size, gfp_t flags)
+{
+ return __do_kmalloc(size, flags, NULL);
}
EXPORT_SYMBOL(__kmalloc);
+#else
+
+void *__kmalloc_track_caller(size_t size, gfp_t flags, void *caller)
+{
+ return __do_kmalloc(size, flags, caller);
+}
+EXPORT_SYMBOL(__kmalloc_track_caller);
+
+#endif
+
#ifdef CONFIG_SMP
/**
* __alloc_percpu - allocate one copy of the object for every present