From c708443c004f2310abdd7f1c353daa372b37f7a2 Mon Sep 17 00:00:00 2001 From: NeilBrown <neilb@suse.de> Date: Fri, 6 Jan 2006 00:20:45 -0800 Subject: [PATCH] md: make sure bitmap updates are visible through filesystem When we update a page_cache page in the kernel, we need to flush_dache_page or userspace might not see the change. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> --- drivers/md/bitmap.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index ee4a3424a8a3..76a189ceb529 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -315,6 +315,8 @@ static int write_page(struct bitmap *bitmap, struct page *page, int wait) if (bitmap->file == NULL) return write_sb_page(bitmap->mddev, bitmap->offset, page, wait); + flush_dcache_page(page); /* make sure visible to anyone reading the file */ + if (wait) lock_page(page); else { -- cgit v1.2.2