knfsd: rename sk_defer_lock to sk_lock

Now that sk_defer_lock protects two different things, make the name more
generic.

Also don't bother with disabling _bh as the lock is only ever taken from
process context.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index 2bd23ea..07dcd20 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -385,7 +385,7 @@
 {
 	struct ip_map *ipm;
 	struct svc_sock *svsk = rqstp->rq_sock;
-	spin_lock_bh(&svsk->sk_defer_lock);
+	spin_lock(&svsk->sk_lock);
 	ipm = svsk->sk_info_authunix;
 	if (ipm != NULL) {
 		if (!cache_valid(&ipm->h)) {
@@ -395,13 +395,13 @@
 			 * same IP address.
 			 */
 			svsk->sk_info_authunix = NULL;
-			spin_unlock_bh(&svsk->sk_defer_lock);
+			spin_unlock(&svsk->sk_lock);
 			cache_put(&ipm->h, &ip_map_cache);
 			return NULL;
 		}
 		cache_get(&ipm->h);
 	}
-	spin_unlock_bh(&svsk->sk_defer_lock);
+	spin_unlock(&svsk->sk_lock);
 	return ipm;
 }
 
@@ -410,14 +410,14 @@
 {
 	struct svc_sock *svsk = rqstp->rq_sock;
 
-	spin_lock_bh(&svsk->sk_defer_lock);
+	spin_lock(&svsk->sk_lock);
 	if (svsk->sk_sock->type == SOCK_STREAM &&
 	    svsk->sk_info_authunix == NULL) {
 		/* newly cached, keep the reference */
 		svsk->sk_info_authunix = ipm;
 		ipm = NULL;
 	}
-	spin_unlock_bh(&svsk->sk_defer_lock);
+	spin_unlock(&svsk->sk_lock);
 	if (ipm)
 		cache_put(&ipm->h, &ip_map_cache);
 }