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authorPekka Enberg <penberg@cs.helsinki.fi>2009-03-25 11:05:57 +0200
committerIngo Molnar <mingo@elte.hu>2009-04-03 12:23:10 +0200
commit2121db74ba0fd2259f0e2265511684fadda9ac49 (patch)
tree823401f3bce7018535ceea69103a28accd5794f7 /mm
parentkmemtrace: small cleanups (diff)
downloadlinux-dev-2121db74ba0fd2259f0e2265511684fadda9ac49.tar.xz
linux-dev-2121db74ba0fd2259f0e2265511684fadda9ac49.zip
kmemtrace: trace kfree() calls with NULL or zero-length objects
Impact: also output kfree(NULL) entries This patch moves the trace_kfree() calls before the ZERO_OR_NULL_PTR check so that we can trace call-sites that call kfree() with NULL many times which might be an indication of a bug. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> LKML-Reference: <1237971957.30175.18.camel@penberg-laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'mm')
-rw-r--r--mm/slab.c4
-rw-r--r--mm/slob.c4
-rw-r--r--mm/slub.c4
3 files changed, 6 insertions, 6 deletions
diff --git a/mm/slab.c b/mm/slab.c
index fa00fd6a644d..b58400285030 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3773,6 +3773,8 @@ void kfree(const void *objp)
struct kmem_cache *c;
unsigned long flags;
+ trace_kfree(_RET_IP_, objp);
+
if (unlikely(ZERO_OR_NULL_PTR(objp)))
return;
local_irq_save(flags);
@@ -3782,8 +3784,6 @@ void kfree(const void *objp)
debug_check_no_obj_freed(objp, obj_size(c));
__cache_free(c, (void *)objp);
local_irq_restore(flags);
-
- trace_kfree(_RET_IP_, objp);
}
EXPORT_SYMBOL(kfree);
diff --git a/mm/slob.c b/mm/slob.c
index 00003587ebfa..a2d4ab32198d 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -514,6 +514,8 @@ void kfree(const void *block)
{
struct slob_page *sp;
+ trace_kfree(_RET_IP_, block);
+
if (unlikely(ZERO_OR_NULL_PTR(block)))
return;
@@ -524,8 +526,6 @@ void kfree(const void *block)
slob_free(m, *m + align);
} else
put_page(&sp->page);
-
- trace_kfree(_RET_IP_, block);
}
EXPORT_SYMBOL(kfree);
diff --git a/mm/slub.c b/mm/slub.c
index a98078bf738b..7ab54ecbd3f3 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2792,6 +2792,8 @@ void kfree(const void *x)
struct page *page;
void *object = (void *)x;
+ trace_kfree(_RET_IP_, x);
+
if (unlikely(ZERO_OR_NULL_PTR(x)))
return;
@@ -2802,8 +2804,6 @@ void kfree(const void *x)
return;
}
slab_free(page->slab, page, object, _RET_IP_);
-
- trace_kfree(_RET_IP_, x);
}
EXPORT_SYMBOL(kfree);