[PATCH] powerpc: iseries: mf related cleanups

[powerpc.git] / ipc / sem.c

diff --git a/ipc/sem.c b/ipc/sem.c
index 19af028..31fd402 100644 (file)
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -56,7 +56,7 @@
  * /proc/sysvipc/sem support (c) 1999 Dragos Acostachioaie <dragos@iname.com>
  *
  * SMP-threaded, sysctl's added
- * (c) 1999 Manfred Spraul <manfreds@colorfullife.com>
+ * (c) 1999 Manfred Spraul <manfred@colorfullife.com>
  * Enforced range limit on SEM_UNDO
  * (c) 2001 Red Hat Inc <alan@redhat.com>
  * Lockless wakeup
@@ -73,6 +73,7 @@
 #include <linux/security.h>
 #include <linux/syscalls.h>
 #include <linux/audit.h>
+#include <linux/capability.h>
 #include <linux/seq_file.h>
 #include <asm/uaccess.h>
 #include "util.h"
@@ -381,6 +382,7 @@ static void update_queue (struct sem_array * sma)
                        /* hands-off: q will disappear immediately after
                         * writing q->status.
                         */
+                       smp_wmb();
                        q->status = error;
                        q = n;
                } else {
@@ -461,6 +463,7 @@ static void freeary (struct sem_array *sma, int id)
                n = q->next;
                q->status = IN_WAKEUP;
                wake_up_process(q->sleeper); /* doesn't sleep */
+               smp_wmb();
                q->status = -EIDRM;     /* hands-off q */
                q = n;
        }