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-rw-r--r--include/linux/rmap.h15
1 files changed, 14 insertions, 1 deletions
diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index 5c98df68a95..07ea89c1676 100644
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -230,7 +230,20 @@ int try_to_munlock(struct page *);
/*
* Called by memory-failure.c to kill processes.
*/
-struct anon_vma *page_lock_anon_vma(struct page *page);
+struct anon_vma *__page_lock_anon_vma(struct page *page);
+
+static inline struct anon_vma *page_lock_anon_vma(struct page *page)
+{
+ struct anon_vma *anon_vma;
+
+ __cond_lock(RCU, anon_vma = __page_lock_anon_vma(page));
+
+ /* (void) is needed to make gcc happy */
+ (void) __cond_lock(&anon_vma->root->lock, anon_vma);
+
+ return anon_vma;
+}
+
void page_unlock_anon_vma(struct anon_vma *anon_vma);
int page_mapped_in_vma(struct page *page, struct vm_area_struct *vma);