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authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2011-05-24 17:11:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-25 08:39:08 -0700
commitf62e00cc3a00bfbd394a79fc22b334c31f91bd5f (patch)
tree29e0a3ac793e4a5a15bbbe4b4945470a41e820e7 /mm
parentfa25c503dfa203b921199ea42c0046c89f2ed49f (diff)
downloadop-kernel-dev-f62e00cc3a00bfbd394a79fc22b334c31f91bd5f.zip
op-kernel-dev-f62e00cc3a00bfbd394a79fc22b334c31f91bd5f.tar.gz
mm: introduce wait_on_page_locked_killable()
commit 2687a356 ("Add lock_page_killable") introduced killable lock_page(). Similarly this patch introdues killable wait_on_page_locked(). Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/filemap.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index c641edf..dea8a38 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -562,6 +562,17 @@ void wait_on_page_bit(struct page *page, int bit_nr)
}
EXPORT_SYMBOL(wait_on_page_bit);
+int wait_on_page_bit_killable(struct page *page, int bit_nr)
+{
+ DEFINE_WAIT_BIT(wait, &page->flags, bit_nr);
+
+ if (!test_bit(bit_nr, &page->flags))
+ return 0;
+
+ return __wait_on_bit(page_waitqueue(page), &wait,
+ sleep_on_page_killable, TASK_KILLABLE);
+}
+
/**
* add_page_wait_queue - Add an arbitrary waiter to a page's wait queue
* @page: Page defining the wait queue of interest
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