CRED: Restore const to current_cred()

Commit 3295514841c2 ("fix rcu annotations noise in cred.h") accidentally
dropped the const of current->cred inside current_cred() by the
insertion of a cast to deal with an RCU annotation loss warning from
sparce.

Use an appropriate RCU wrapper instead so as not to lose the const.

Signed-off-by: David Howells <[email protected]>
Reviewed-by: Paul E. McKenney <[email protected]>
cc: Al Viro <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/include/linux/cred.h b/include/linux/cred.h
index 98f46efbe2d21a422802d7fd7bbee06d0b993116..8e2fd44eb16059abc64cdda42cbd18eb25808c93 100644 (file)
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -269,7 +269,7 @@ static inline void put_cred(const struct cred *_cred)
  * since nobody else can modify it.
  */
 #define current_cred() \
-       (*(__force struct cred **)&current->cred)
+       rcu_dereference_protected(current->cred, 1)
 
 /**
  * __task_cred - Access a task's objective credentials