[PATCH] NFS: Fix races in nfs_revalidate_mapping()

Prevent the call to invalidate_inode_pages2() from racing with file writes
by taking the inode->i_mutex across the page cache flush and invalidate.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index dee3d6c0f194..d9ba8cb0ee75 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -532,7 +532,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
 
         lock_kernel();
 
-        res = nfs_revalidate_mapping(inode, filp->f_mapping);
+        res = nfs_revalidate_mapping_nolock(inode, filp->f_mapping);
         if (res < 0) {
                 unlock_kernel();
                 return res;