cifs: add function to get a tcon from cifs_sb

When we convert cifs to do multiple sessions per mount, we'll need more
than one tcon per superblock. At that point "cifs_sb->tcon" will make
no sense. Add a new accessor function that gets a tcon given a cifs_sb.
For now, it just returns cifs_sb->tcon. Later it'll do more.

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

1 files changed, 4 insertions, 3 deletions

diff --git a/fs/cifs/fscache.c b/fs/cifs/fscache.c
index 9f3f5c4be161..ec4318b019cc 100644
--- a/fs/cifs/fscache.c
+++ b/fs/cifs/fscache.c
@@ -66,11 +66,11 @@ static void cifs_fscache_enable_inode_cookie(struct inode *inode)
         if (cifsi->fscache)
                 return;
 
-        cifsi->fscache = fscache_acquire_cookie(cifs_sb->tcon->fscache,
+        cifsi->fscache = fscache_acquire_cookie(cifs_sb_tcon(cifs_sb)->fscache,
                                 &cifs_fscache_inode_object_def,
                                 cifsi);
         cFYI(1, "CIFS: got FH cookie (0x%p/0x%p)",
-                        cifs_sb->tcon->fscache, cifsi->fscache);
+                        cifs_sb_tcon(cifs_sb)->fscache, cifsi->fscache);
 }
 
 void cifs_fscache_release_inode_cookie(struct inode *inode)
@@ -117,7 +117,8 @@ void cifs_fscache_reset_inode_cookie(struct inode *inode)
                 /* retire the current fscache cache and get a new one */
                 fscache_relinquish_cookie(cifsi->fscache, 1);
 
-                cifsi->fscache = fscache_acquire_cookie(cifs_sb->tcon->fscache,
+                cifsi->fscache = fscache_acquire_cookie(
+                                        cifs_sb_tcon(cifs_sb)->fscache,
                                         &cifs_fscache_inode_object_def,
                                         cifsi);
                 cFYI(1, "CIFS: new cookie 0x%p oldcookie 0x%p",