* Special handling for cmpxchg_double. cmpxchg_double is passed two
* percpu variables. The first has to be aligned to a double word
* boundary and the second has to follow directly thereafter.
+ * We enforce this on all architectures even if they don't support
+ * a double cmpxchg instruction, since it's a cheap requirement, and it
+ * avoids breaking the requirement for architectures with the instruction.
*/
#define __pcpu_double_call_return_bool(stem, pcp1, pcp2, ...) \
({ \
* Release an obj back to its cache. If the obj has a constructed state, it must
* be in this state _before_ it is released. Called with disabled ints.
*/
-static inline void __cache_free(struct kmem_cache *cachep, void *objp)
+static inline void __cache_free(struct kmem_cache *cachep, void *objp,
+ void *caller)
{
struct array_cache *ac = cpu_cache_get(cachep);
check_irq_off();
kmemleak_free_recursive(objp, cachep->flags);
- objp = cache_free_debugcheck(cachep, objp, __builtin_return_address(0));
+ objp = cache_free_debugcheck(cachep, objp, caller);
kmemcheck_slab_free(cachep, objp, obj_size(cachep));
debug_check_no_locks_freed(objp, obj_size(cachep));
if (!(cachep->flags & SLAB_DEBUG_OBJECTS))
debug_check_no_obj_freed(objp, obj_size(cachep));
- __cache_free(cachep, objp);
+ __cache_free(cachep, objp, __builtin_return_address(0));
local_irq_restore(flags);
trace_kmem_cache_free(_RET_IP_, objp);
c = virt_to_cache(objp);
debug_check_no_locks_freed(objp, obj_size(c));
debug_check_no_obj_freed(objp, obj_size(c));
- __cache_free(c, (void *)objp);
+ __cache_free(c, (void *)objp, __builtin_return_address(0));
local_irq_restore(flags);
}
EXPORT_SYMBOL(kfree);
BUILD_BUG_ON(PERCPU_DYNAMIC_EARLY_SIZE <
SLUB_PAGE_SHIFT * sizeof(struct kmem_cache_cpu));
-#ifdef CONFIG_CMPXCHG_LOCAL
/*
- * Must align to double word boundary for the double cmpxchg instructions
- * to work.
+ * Must align to double word boundary for the double cmpxchg
+ * instructions to work; see __pcpu_double_call_return_bool().
*/
- s->cpu_slab = __alloc_percpu(sizeof(struct kmem_cache_cpu), 2 * sizeof(void *));
-#else
- /* Regular alignment is sufficient */
- s->cpu_slab = alloc_percpu(struct kmem_cache_cpu);
-#endif
+ s->cpu_slab = __alloc_percpu(sizeof(struct kmem_cache_cpu),
+ 2 * sizeof(void *));
if (!s->cpu_slab)
return 0;