tree 4fb5e80428c4f36c5da35ff3319cd71c1771451c
parent 25add8cf99c9ec8b8dc0acd8b9241e963fc0d29c
author David Howells <dhowells@redhat.com> 1326832780 +0000
committer James Morris <jmorris@namei.org> 1326843687 +1100

KEYS: Add missing smp_rmb() primitives to the keyring search code

Add missing smp_rmb() primitives to the keyring search code.

When keyring payloads are appended to without replacement (thus using up spare
slots in the key pointer array), an smp_wmb() is issued between the pointer
assignment and the increment of the key count (nkeys).

There should be corresponding read barriers between the read of nkeys and
dereferences of keys[n] when n is dependent on the value of nkeys.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>