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Date: Sat, 8 Sep 2012 17:47:55 -0300
From: Ezequiel Garcia <elezegarcia@...il.com>
To: <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>
Cc: Ezequiel Garcia <elezegarcia@...il.com>,
Pekka Enberg <penberg@...nel.org>
Subject: [PATCH 06/10] mm, slab: Replace 'caller' type, void* -> unsigned long
This allows to use _RET_IP_ instead of builtin_address(0), thus
achiveing implementation consistency in all three allocators.
Though maybe a nitpick, the real goal behind this patch is
to be able to obtain common code between SLAB and SLUB.
Cc: Pekka Enberg <penberg@...nel.org>
Signed-off-by: Ezequiel Garcia <elezegarcia@...il.com>
---
mm/slab.c | 50 ++++++++++++++++++++++++--------------------------
1 files changed, 24 insertions(+), 26 deletions(-)
diff --git a/mm/slab.c b/mm/slab.c
index 53e41de..bc342d1 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3083,7 +3083,7 @@ static inline void verify_redzone_free(struct kmem_cache *cache, void *obj)
}
static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp,
- void *caller)
+ unsigned long caller)
{
struct page *page;
unsigned int objnr;
@@ -3103,7 +3103,7 @@ static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp,
*dbg_redzone2(cachep, objp) = RED_INACTIVE;
}
if (cachep->flags & SLAB_STORE_USER)
- *dbg_userword(cachep, objp) = caller;
+ *dbg_userword(cachep, objp) = (void *)caller;
objnr = obj_to_index(cachep, slabp, objp);
@@ -3116,7 +3116,7 @@ static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp,
if (cachep->flags & SLAB_POISON) {
#ifdef CONFIG_DEBUG_PAGEALLOC
if ((cachep->size % PAGE_SIZE)==0 && OFF_SLAB(cachep)) {
- store_stackinfo(cachep, objp, (unsigned long)caller);
+ store_stackinfo(cachep, objp, caller);
kernel_map_pages(virt_to_page(objp),
cachep->size / PAGE_SIZE, 0);
} else {
@@ -3269,7 +3269,7 @@ static inline void cache_alloc_debugcheck_before(struct kmem_cache *cachep,
#if DEBUG
static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep,
- gfp_t flags, void *objp, void *caller)
+ gfp_t flags, void *objp, unsigned long caller)
{
if (!objp)
return objp;
@@ -3286,7 +3286,7 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep,
poison_obj(cachep, objp, POISON_INUSE);
}
if (cachep->flags & SLAB_STORE_USER)
- *dbg_userword(cachep, objp) = caller;
+ *dbg_userword(cachep, objp) = (void *)caller;
if (cachep->flags & SLAB_RED_ZONE) {
if (*dbg_redzone1(cachep, objp) != RED_INACTIVE ||
@@ -3561,7 +3561,7 @@ done:
*/
static __always_inline void *
__cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid,
- void *caller)
+ unsigned long caller)
{
unsigned long save_flags;
void *ptr;
@@ -3647,7 +3647,7 @@ __do_cache_alloc(struct kmem_cache *cachep, gfp_t flags)
#endif /* CONFIG_NUMA */
static __always_inline void *
-__cache_alloc(struct kmem_cache *cachep, gfp_t flags, void *caller)
+__cache_alloc(struct kmem_cache *cachep, gfp_t flags, unsigned long caller)
{
unsigned long save_flags;
void *objp;
@@ -3783,7 +3783,7 @@ free_done:
* be in this state _before_ it is released. Called with disabled ints.
*/
static inline void __cache_free(struct kmem_cache *cachep, void *objp,
- void *caller)
+ unsigned long caller)
{
struct array_cache *ac = cpu_cache_get(cachep);
@@ -3823,7 +3823,7 @@ static inline void __cache_free(struct kmem_cache *cachep, void *objp,
*/
void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags)
{
- void *ret = __cache_alloc(cachep, flags, __builtin_return_address(0));
+ void *ret = __cache_alloc(cachep, flags, _RET_IP_);
trace_kmem_cache_alloc(_RET_IP_, ret,
cachep->object_size, cachep->size, flags);
@@ -3838,7 +3838,7 @@ kmem_cache_alloc_trace(size_t size, struct kmem_cache *cachep, gfp_t flags)
{
void *ret;
- ret = __cache_alloc(cachep, flags, __builtin_return_address(0));
+ ret = __cache_alloc(cachep, flags, _RET_IP_);
trace_kmalloc(_RET_IP_, ret,
size, cachep->size, flags);
@@ -3850,8 +3850,7 @@ EXPORT_SYMBOL(kmem_cache_alloc_trace);
#ifdef CONFIG_NUMA
void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid)
{
- void *ret = __cache_alloc_node(cachep, flags, nodeid,
- __builtin_return_address(0));
+ void *ret = __cache_alloc_node(cachep, flags, nodeid, _RET_IP_);
trace_kmem_cache_alloc_node(_RET_IP_, ret,
cachep->object_size, cachep->size,
@@ -3869,8 +3868,8 @@ void *kmem_cache_alloc_node_trace(size_t size,
{
void *ret;
- ret = __cache_alloc_node(cachep, flags, nodeid,
- __builtin_return_address(0));
+ ret = __cache_alloc_node(cachep, flags, nodeid, _RET_IP);
+
trace_kmalloc_node(_RET_IP_, ret,
size, cachep->size,
flags, nodeid);
@@ -3880,7 +3879,7 @@ EXPORT_SYMBOL(kmem_cache_alloc_node_trace);
#endif
static __always_inline void *
-__do_kmalloc_node(size_t size, gfp_t flags, int node, void *caller)
+__do_kmalloc_node(size_t size, gfp_t flags, int node, unsigned long caller)
{
struct kmem_cache *cachep;
@@ -3893,21 +3892,20 @@ __do_kmalloc_node(size_t size, gfp_t flags, int node, void *caller)
#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_TRACING)
void *__kmalloc_node(size_t size, gfp_t flags, int node)
{
- return __do_kmalloc_node(size, flags, node,
- __builtin_return_address(0));
+ return __do_kmalloc_node(size, flags, node, _RET_IP_);
}
EXPORT_SYMBOL(__kmalloc_node);
void *__kmalloc_node_track_caller(size_t size, gfp_t flags,
int node, unsigned long caller)
{
- return __do_kmalloc_node(size, flags, node, (void *)caller);
+ return __do_kmalloc_node(size, flags, node, caller);
}
EXPORT_SYMBOL(__kmalloc_node_track_caller);
#else
void *__kmalloc_node(size_t size, gfp_t flags, int node)
{
- return __do_kmalloc_node(size, flags, node, NULL);
+ return __do_kmalloc_node(size, flags, node, 0);
}
EXPORT_SYMBOL(__kmalloc_node);
#endif /* CONFIG_DEBUG_SLAB || CONFIG_TRACING */
@@ -3920,7 +3918,7 @@ EXPORT_SYMBOL(__kmalloc_node);
* @caller: function caller for debug tracking of the caller
*/
static __always_inline void *__do_kmalloc(size_t size, gfp_t flags,
- void *caller)
+ unsigned long caller)
{
struct kmem_cache *cachep;
void *ret;
@@ -3935,7 +3933,7 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags,
return cachep;
ret = __cache_alloc(cachep, flags, caller);
- trace_kmalloc((unsigned long) caller, ret,
+ trace_kmalloc(caller, ret,
size, cachep->size, flags);
return ret;
@@ -3945,20 +3943,20 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags,
#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_TRACING)
void *__kmalloc(size_t size, gfp_t flags)
{
- return __do_kmalloc(size, flags, __builtin_return_address(0));
+ return __do_kmalloc(size, flags, _RET_IP_);
}
EXPORT_SYMBOL(__kmalloc);
void *__kmalloc_track_caller(size_t size, gfp_t flags, unsigned long caller)
{
- return __do_kmalloc(size, flags, (void *)caller);
+ return __do_kmalloc(size, flags, caller);
}
EXPORT_SYMBOL(__kmalloc_track_caller);
#else
void *__kmalloc(size_t size, gfp_t flags)
{
- return __do_kmalloc(size, flags, NULL);
+ return __do_kmalloc(size, flags, 0);
}
EXPORT_SYMBOL(__kmalloc);
#endif
@@ -3979,7 +3977,7 @@ void kmem_cache_free(struct kmem_cache *cachep, void *objp)
debug_check_no_locks_freed(objp, cachep->object_size);
if (!(cachep->flags & SLAB_DEBUG_OBJECTS))
debug_check_no_obj_freed(objp, cachep->object_size);
- __cache_free(cachep, objp, __builtin_return_address(0));
+ __cache_free(cachep, objp, _RET_IP_);
local_irq_restore(flags);
trace_kmem_cache_free(_RET_IP_, objp);
@@ -4010,7 +4008,7 @@ void kfree(const void *objp)
debug_check_no_locks_freed(objp, c->object_size);
debug_check_no_obj_freed(objp, c->object_size);
- __cache_free(c, (void *)objp, __builtin_return_address(0));
+ __cache_free(c, (void *)objp, _RET_IP_);
local_irq_restore(flags);
}
EXPORT_SYMBOL(kfree);
--
1.7.8.6
--
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