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kmemtrace: trace kfree() calls with NULL or zero-length objects

Browse source 
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 <[email protected]>
Cc: Eduard - Gabriel Munteanu <[email protected]>
LKML-Reference: <1237971957.30175.18.camel@penberg-laptop>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Pekka Enberg 2009-03-25 11:05:57 +02:00 • committed by Ingo Molnar
commit 2121db74ba
3 changed files with 6 additions and 6 deletions
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4
mm/slob.c
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@ -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);