linux-kernel - [PATCH V2] slab: fix caller tracking on !CONFIG_DEBUG_SLAB && CONFIG

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Message-Id: <1277891842-18898-1-git-send-email-dfeng@redhat.com>
Date:	Wed, 30 Jun 2010 17:57:22 +0800
From:	Xiaotian Feng <dfeng@...hat.com>
To:	linux-mm@...ck.org
Cc:	linux-kernel@...r.kernel.org, Xiaotian Feng <dfeng@...hat.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Matt Mackall <mpm@...enic.com>,
	Vegard Nossum <vegard.nossum@...il.com>,
	Dmitry Monakhov <dmonakhov@...nvz.org>,
	Catalin Marinas <catalin.marinas@....com>,
	David Rientjes <rientjes@...gle.com>
Subject: [PATCH V2] slab: fix caller tracking on !CONFIG_DEBUG_SLAB && CONFIG_TRACING

In slab, all __xxx_track_caller is defined on CONFIG_DEBUG_SLAB || CONFIG_TRACING,
thus caller tracking function should be worked for CONFIG_TRACING. But if
CONFIG_DEBUG_SLAB is not set, include/linux/slab.h will define xxx_track_caller to
__xxx() without consideration of CONFIG_TRACING. This will break the caller tracking
behaviour then.

Signed-off-by: Xiaotian Feng <dfeng@...hat.com>
Cc: Christoph Lameter <cl@...ux-foundation.org>
Cc: Pekka Enberg <penberg@...helsinki.fi>
Cc: Matt Mackall <mpm@...enic.com>
Cc: Vegard Nossum <vegard.nossum@...il.com>
Cc: Dmitry Monakhov <dmonakhov@...nvz.org>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: David Rientjes <rientjes@...gle.com>
---
 include/linux/slab.h |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/linux/slab.h b/include/linux/slab.h
index 49d1247..59260e2 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -268,7 +268,8 @@ static inline void *kmem_cache_alloc_node(struct kmem_cache *cachep,
  * allocator where we care about the real place the memory allocation
  * request comes from.
  */
-#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_SLUB)
+#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_SLUB) || \
+	(defined(CONFIG_SLAB) && defined(CONFIG_TRACING))
 extern void *__kmalloc_track_caller(size_t, gfp_t, unsigned long);
 #define kmalloc_track_caller(size, flags) \
 	__kmalloc_track_caller(size, flags, _RET_IP_)
@@ -286,7 +287,8 @@ extern void *__kmalloc_track_caller(size_t, gfp_t, unsigned long);
  * standard allocator where we care about the real place the memory
  * allocation request comes from.
  */
-#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_SLUB)
+#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_SLUB) || \
+	(defined(CONFIG_SLAB) && defined(CONFIG_TRACING))
 extern void *__kmalloc_node_track_caller(size_t, gfp_t, int, unsigned long);
 #define kmalloc_node_track_caller(size, flags, node) \
 	__kmalloc_node_track_caller(size, flags, node, \
-- 
1.7.0.1

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