cifs: add cifs_revalidate_file

...to allow updating inode attributes on an existing inode by
filehandle. Change mmap and llseek codepaths to use that
instead of cifs_revalidate_dentry since they have a filehandle
readily available.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index b90f8f2ca85c..1389f6ecef9e 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1890,11 +1890,10 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size,
 
 int cifs_file_mmap(struct file *file, struct vm_area_struct *vma)
 {
-        struct dentry *dentry = file->f_path.dentry;
         int rc, xid;
 
         xid = GetXid();
-        rc = cifs_revalidate_dentry(dentry);
+        rc = cifs_revalidate_file(file);
         if (rc) {
                 cFYI(1, ("Validation prior to mmap failed, error=%d", rc));
                 FreeXid(xid);