[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>
diff --git a/include/linux/slab.h b/include/linux/slab.h
index 1fb77a9..8cf5293 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -76,7 +76,14 @@
kmem_cache_t *cs_dmacachep;
};
extern struct cache_sizes malloc_sizes[];
+
+#ifndef CONFIG_DEBUG_SLAB
extern void *__kmalloc(size_t, gfp_t);
+#else
+extern void *__kmalloc_track_caller(size_t, gfp_t, void*);
+#define __kmalloc(size, flags) \
+ __kmalloc_track_caller(size, flags, __builtin_return_address(0))
+#endif
static inline void *kmalloc(size_t size, gfp_t flags)
{