Commit 4c5eface authored May 01, 2009 by Frederic Weisbecker

kill-the-BKL/reiserfs: release the write lock inside reiserfs_read_bitmap_block()



reiserfs_read_bitmap_block() uses sb_bread() to read the bitmap block. This
helper might sleep.

Then, when the bkl was used, it was released at this point. We can then
relax the write lock too here.

[ Impact: release the reiserfs write lock when it is not needed ]

Cc: Jeff Mahoney <jeffm@suse.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

parent 148d3504

fs/reiserfs/bitmap.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1249,7 +1249,9 @@ struct buffer_head reiserfs_read_bitmap_block(struct super_block sb,
		else if (bitmap == 0)
		block = (REISERFS_DISK_OFFSET_IN_BYTES >> sb->s_blocksize_bits) + 1;

		reiserfs_write_unlock(sb);
		bh = sb_bread(sb, block);
		reiserfs_write_lock(sb);
		if (bh == NULL)
		reiserfs_warning(sb, "sh-2029: %s: bitmap block (#%u) "
		"reading failed", __func__, block);