提交 f62e00cc 编写于 作者: K KOSAKI Motohiro 提交者: Linus Torvalds

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: NKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: NMinchan 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: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 fa25c503
...@@ -357,6 +357,15 @@ static inline int lock_page_or_retry(struct page *page, struct mm_struct *mm, ...@@ -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 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. * Wait for a page to be unlocked.
* *
......
...@@ -562,6 +562,17 @@ void wait_on_page_bit(struct page *page, int bit_nr) ...@@ -562,6 +562,17 @@ void wait_on_page_bit(struct page *page, int bit_nr)
} }
EXPORT_SYMBOL(wait_on_page_bit); 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 * add_page_wait_queue - Add an arbitrary waiter to a page's wait queue
* @page: Page defining the wait queue of interest * @page: Page defining the wait queue of interest
......
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