CRED: Separate task security context from task_struct

Separate the task security context from task_struct.  At this point, the
security data is temporarily embedded in the task_struct with two pointers
pointing to it.

Note that the Alpha arch is altered as it refers to (E)UID and (E)GID in
entry.S via asm-offsets.

With comment fixes Signed-off-by: Marc Dionne <marc.c.dionne@gmail.com>

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>

2 files changed, 3 insertions, 5 deletions

diff --git a/fs/xfs/linux-2.6/xfs_cred.h b/fs/xfs/linux-2.6/xfs_cred.h
index 293043a5573a..8c022cd0ad67 100644
--- a/fs/xfs/linux-2.6/xfs_cred.h
+++ b/fs/xfs/linux-2.6/xfs_cred.h
@@ -23,11 +23,9 @@
 /*
  * Credentials
  */
-typedef struct cred {
-       /* EMPTY */
-} cred_t;
+typedef const struct cred cred_t;
 
-extern struct cred *sys_cred;
+extern cred_t *sys_cred;
 
 /* this is a hack.. (assumes sys_cred is the only cred_t in the system) */
 static inline int capable_cred(cred_t *cr, int cid)
diff --git a/fs/xfs/linux-2.6/xfs_globals.h b/fs/xfs/linux-2.6/xfs_globals.h
index 2770b0085ee8..6eda8a3eb6f1 100644
--- a/fs/xfs/linux-2.6/xfs_globals.h
+++ b/fs/xfs/linux-2.6/xfs_globals.h
@@ -19,6 +19,6 @@
 #define __XFS_GLOBALS_H__
 
 extern uint64_t xfs_panic_mask;         /* set to cause more panics */
-extern struct cred *sys_cred;
+extern cred_t *sys_cred;
 
 #endif  /* __XFS_GLOBALS_H__ */