commit 6dab81574346c831ded96ae3ab0e8f9ca72c37ae
author Chris Mason <chris.mason@oracle.com> Mon Aug 04 08:35:53 2008 -0400
committer Chris Mason <chris.mason@oracle.com> Thu Sep 25 11:04:06 2008 -0400
tree 5ce65744c1ed6d81a7799c52532893d2e0ae3da1
parent 2dd3e67b1eaec8504da7e12b8afee77323a49f38

Btrfs: Hold csum mutex while reading in sums during readpages

Signed-off-by: Chris Mason <chris.mason@oracle.com>

fs/btrfs/inode.c

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 76365ad..640648c 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -376,7 +376,9 @@
 	if (!(rw & (1 << BIO_RW))) {
 		if (!btrfs_test_opt(root, NODATASUM) &&
 		    !btrfs_test_flag(inode, NODATASUM)) {
+			mutex_lock(&BTRFS_I(inode)->csum_mutex);
 			btrfs_lookup_bio_sums(root, inode, bio);
+			mutex_unlock(&BTRFS_I(inode)->csum_mutex);
 		}
 		goto mapit;
 	}