Commit 9ba00538 authored Sep 09, 2005 by NeilBrown Committed by Linus Torvalds Sep 09, 2005

[PATCH] md: ensure bitmap_writeback_daemon handles shutdown properly.



mddev->bitmap gets clearred before the writeback daemon is stopped.  So the
write_back daemon needs to be careful not to dereference the 'bitmap' if it is
NULL.

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent a6fb0934

drivers/md/bitmap.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1156,6 +1156,9 @@ static void bitmap_writeback_daemon(mddev_t *mddev)
		err = -EINTR;
		goto out;
		}
		if (bitmap == NULL)
		/* about to be stopped. */
		return;

		PRINTK("%s: bitmap writeback daemon woke up...\n", bmname(bitmap));
		/* wait on bitmap page writebacks */