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.
Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
diff --git a/mm/slab.c b/mm/slab.c
index 7072848..6c35679 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3084,7 +3084,7 @@
}
static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp,
- void *caller)
+ unsigned long caller)
{
struct page *page;
unsigned int objnr;
@@ -3104,7 +3104,7 @@
*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);
@@ -3117,7 +3117,7 @@
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 {
@@ -3270,7 +3270,7 @@
#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;
@@ -3287,7 +3287,7 @@
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 ||
@@ -3562,7 +3562,7 @@
*/
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;
@@ -3648,7 +3648,7 @@
#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;
@@ -3784,7 +3784,7 @@
* 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);
@@ -3824,7 +3824,7 @@
*/
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);
@@ -3839,7 +3839,7 @@
{
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);
@@ -3851,8 +3851,7 @@
#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,
@@ -3870,8 +3869,8 @@
{
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);
@@ -3881,7 +3880,7 @@
#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;
@@ -3894,21 +3893,20 @@
#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 */
@@ -3921,7 +3919,7 @@
* @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;
@@ -3936,7 +3934,7 @@
return cachep;
ret = __cache_alloc(cachep, flags, caller);
- trace_kmalloc((unsigned long) caller, ret,
+ trace_kmalloc(caller, ret,
size, cachep->size, flags);
return ret;
@@ -3946,20 +3944,20 @@
#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
@@ -3980,7 +3978,7 @@
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);
@@ -4011,7 +4009,7 @@
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);