Cc: Ingo Molnar <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Michel Lespinasse <[email protected]>
Signed-off-by: Yuanhan Liu <[email protected]>
---
mm/rmap.c | 23 +++++++++--------------
1 files changed, 9 insertions(+), 14 deletions(-)
diff --git a/mm/rmap.c b/mm/rmap.c
index 246b5fe..831dd4e 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -67,19 +67,7 @@ static struct kmem_cache *anon_vma_chain_cachep;
static inline struct anon_vma *anon_vma_alloc(void)
{
- struct anon_vma *anon_vma;
-
- anon_vma = kmem_cache_alloc(anon_vma_cachep, GFP_KERNEL);
- if (anon_vma) {
- atomic_set(&anon_vma->refcount, 1);
- /*
- * Initialise the anon_vma root to point to itself. If called
- * from fork, the root will be reset to the parents anon_vma.
- */
- anon_vma->root = anon_vma;
- }
-
- return anon_vma;
+ return kmem_cache_alloc(anon_vma_cachep, GFP_KERNEL);
}
static inline void anon_vma_free(struct anon_vma *anon_vma)
@@ -293,8 +281,15 @@ static void anon_vma_ctor(void *data)
struct anon_vma *anon_vma = data;
rwlock_init(&anon_vma->rwlock);
- atomic_set(&anon_vma->refcount, 0);
anon_vma->rb_root = RB_ROOT;
+
+ atomic_set(&anon_vma->refcount, 1);
+ /*
+ * Initialise the anon_vma root to point to itself. If called
+ * from fork, the root will be reset to the parents anon_vma.
+ */
+ anon_vma->root = anon_vma;
+
}
void __init anon_vma_init(void)
--
1.7.7.6
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
