drm/msm: export hangcheck_period in debugfs

[linux-2.6-microblaze.git] / ipc / sem.c

diff --git a/ipc/sem.c b/ipc/sem.c
index f6c30a8..bf534c7 100644 (file)
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -36,7 +36,7 @@
  * - two Linux specific semctl() commands: SEM_STAT, SEM_INFO.
  * - undo adjustments at process exit are limited to 0..SEMVMX.
  * - namespace are supported.
- * - SEMMSL, SEMMNS, SEMOPM and SEMMNI can be configured at runtine by writing
+ * - SEMMSL, SEMMNS, SEMOPM and SEMMNI can be configured at runtime by writing
  *   to /proc/sys/kernel/sem.
  * - statistics about the usage are reported in /proc/sysvipc/sem.
  *
@@ -224,7 +224,7 @@ static int sysvipc_sem_proc_show(struct seq_file *s, void *it);
  * Setting it to a result code is a RELEASE, this is ensured by both a
  * smp_store_release() (for case a) and while holding sem_lock()
  * (for case b).
- * The AQUIRE when reading the result code without holding sem_lock() is
+ * The ACQUIRE when reading the result code without holding sem_lock() is
  * achieved by using READ_ONCE() + smp_acquire__after_ctrl_dep().
  * (case a above).
  * Reading the result code while holding sem_lock() needs no further barriers,
@@ -784,12 +784,14 @@ would_block:
 static inline void wake_up_sem_queue_prepare(struct sem_queue *q, int error,
                                             struct wake_q_head *wake_q)
 {
-       get_task_struct(q->sleeper);
+       struct task_struct *sleeper;
 
-       /* see SEM_BARRIER_2 for purpuse/pairing */
+       sleeper = get_task_struct(q->sleeper);
+
+       /* see SEM_BARRIER_2 for purpose/pairing */
        smp_store_release(&q->status, error);
 
-       wake_q_add_safe(wake_q, q->sleeper);
+       wake_q_add_safe(wake_q, sleeper);
 }
 
 static void unlink_queue(struct sem_array *sma, struct sem_queue *q)
@@ -821,7 +823,7 @@ static inline int check_restart(struct sem_array *sma, struct sem_queue *q)
 
        /* It is impossible that someone waits for the new value:
         * - complex operations always restart.
-        * - wait-for-zero are handled seperately.
+        * - wait-for-zero are handled separately.
         * - q is a previously sleeping simple operation that
         *   altered the array. It must be a decrement, because
         *   simple increments never sleep.
@@ -1046,7 +1048,7 @@ static void do_smart_update(struct sem_array *sma, struct sembuf *sops, int nsop
                         * - No complex ops, thus all sleeping ops are
                         *   decrease.
                         * - if we decreased the value, then any sleeping
-                        *   semaphore ops wont be able to run: If the
+                        *   semaphore ops won't be able to run: If the
                         *   previous value was too small, then the new
                         *   value will be too small, too.
                         */
@@ -2108,7 +2110,7 @@ static long do_semtimedop(int semid, struct sembuf __user *tsops,
        queue.dupsop = dupsop;
 
        error = perform_atomic_semop(sma, &queue);
-       if (error == 0) { /* non-blocking succesfull path */
+       if (error == 0) { /* non-blocking successful path */
                DEFINE_WAKE_Q(wake_q);
 
                /*