diff options
Diffstat (limited to 'ipc/sem.c')
| -rw-r--r-- | ipc/sem.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/ipc/sem.c b/ipc/sem.c index 19af028a3e3..31fd4027d2b 100644 --- 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; } |