coda: Cache permisions in struct coda_inode_info in a kuid_t.

- Change c_uid in struct coda_indoe_info from a vuid_t to a kuid_t.
- Initialize c_uid to GLOBAL_ROOT_UID instead of 0.
- Use uid_eq to compare cached kuids.

Cc: Jan Harkes <jaharkes@cs.cmu.edu>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

fs/coda/coda_fs_i.h

@@ -25,7 +25,7 @@ struct coda_inode_info {
 	u_short	           c_flags;     /* flags (see below) */
 	unsigned int	   c_mapcount;  /* nr of times this inode is mapped */
 	unsigned int	   c_cached_epoch; /* epoch for cached permissions */
-	vuid_t		   c_uid;	/* fsuid for cached permissions */
+	kuid_t		   c_uid;	/* fsuid for cached permissions */
 	unsigned int       c_cached_perm; /* cached access permissions */
 	spinlock_t	   c_lock;
 	struct inode	   vfs_inode;