We can disable debug_pagealloc processing even if the code is complied
with CONFIG_DEBUG_PAGEALLOC. This patch changes the code to query
whether it is enabled or not in runtime.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
---
mm/slub.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/mm/slub.c b/mm/slub.c
index 7d4da68..7b5a965 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -256,11 +256,12 @@ static inline void *get_freepointer_safe(struct kmem_cache *s, void *object)
{
void *p;
-#ifdef CONFIG_DEBUG_PAGEALLOC
- probe_kernel_read(&p, (void **)(object + s->offset), sizeof(p));
-#else
- p = get_freepointer(s, object);
-#endif
+ if (debug_pagealloc_enabled()) {
+ probe_kernel_read(&p,
+ (void **)(object + s->offset), sizeof(p));
+ } else
+ p = get_freepointer(s, object);
+
return p;
}
--
1.9.1
--
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