mm: introduce wait_on_page_locked_killable()

[pandora-kernel.git] / include / linux / pagemap.h

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index c119506..ea26808 100644 (file)
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -357,6 +357,15 @@ static inline int lock_page_or_retry(struct page *page, struct mm_struct *mm,
  */
 extern void wait_on_page_bit(struct page *page, int bit_nr);
 
+extern int wait_on_page_bit_killable(struct page *page, int bit_nr);
+
+static inline int wait_on_page_locked_killable(struct page *page)
+{
+       if (PageLocked(page))
+               return wait_on_page_bit_killable(page, PG_locked);
+       return 0;
+}
+
 /* 
  * Wait for a page to be unlocked.
  *