From 2687a3569e40b1302f96698bcd6329aeb0ce3dd2 Mon Sep 17 00:00:00 2001 From: Matthew Wilcox Date: Thu, 6 Dec 2007 11:18:49 -0500 Subject: Add lock_page_killable This routine is like lock_page, but can be interrupted by a fatal signal Signed-off-by: Matthew Wilcox --- include/linux/pagemap.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'include/linux/pagemap.h') diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index db8a410..4b62a10 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -157,6 +157,7 @@ static inline pgoff_t linear_page_index(struct vm_area_struct *vma, } extern void FASTCALL(__lock_page(struct page *page)); +extern int FASTCALL(__lock_page_killable(struct page *page)); extern void FASTCALL(__lock_page_nosync(struct page *page)); extern void FASTCALL(unlock_page(struct page *page)); @@ -171,6 +172,19 @@ static inline void lock_page(struct page *page) } /* + * lock_page_killable is like lock_page but can be interrupted by fatal + * signals. It returns 0 if it locked the page and -EINTR if it was + * killed while waiting. + */ +static inline int lock_page_killable(struct page *page) +{ + might_sleep(); + if (TestSetPageLocked(page)) + return __lock_page_killable(page); + return 0; +} + +/* * lock_page_nosync should only be used if we can't pin the page's inode. * Doesn't play quite so well with block device plugging. */ -- cgit v1.1