Commit e5dbd332 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle) Committed by David Howells
Browse files

mm/writeback: Add wait_on_page_writeback_killable 



This is the killable version of wait_on_page_writeback.

Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Tested-by: default avatar <kafs-testing@auristor.com>
cc: linux-afs@lists.infradead.org
cc: linux-mm@kvack.org
Link: https://lore.kernel.org/r/20210320054104.1300774-3-willy@infradead.org
parent 39f985c8

include/linux/pagemap.h

+1 −0
Original line number Diff line number Diff line
@@ -682,6 +682,7 @@ static inline int wait_on_page_locked_killable(struct page *page) 


int put_and_wait_on_page_locked(struct page *page, int state);

void wait_on_page_writeback(struct page *page);

int wait_on_page_writeback_killable(struct page *page);

extern void end_page_writeback(struct page *page);

void wait_for_stable_page(struct page *page);

mm/page-writeback.c

+16 −0
Original line number Diff line number Diff line
@@ -2833,6 +2833,22 @@ void wait_on_page_writeback(struct page *page) 
}

EXPORT_SYMBOL_GPL(wait_on_page_writeback);



/*

 * Wait for a page to complete writeback.  Returns -EINTR if we get a

 * fatal signal while waiting.

 */

int wait_on_page_writeback_killable(struct page *page)

{

	while (PageWriteback(page)) {

		trace_wait_on_page_writeback(page, page_mapping(page));

		if (wait_on_page_bit_killable(page, PG_writeback))

			return -EINTR;

	}



	return 0;

}

EXPORT_SYMBOL_GPL(wait_on_page_writeback_killable);



/**

 * wait_for_stable_page() - wait for writeback to finish, if necessary.

 * @page:	The page to wait on.