locking/rwsem: Use task->state helpers

Call __set_task_state() instead of assigning the new state
directly. These interfaces also aid CONFIG_DEBUG_ATOMIC_SLEEP
environments, keeping track of who last changed the state.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Jason Low <jason.low2@hp.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1422257769-14083-2-git-send-email-dave@stgolabs.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/kernel/locking/rwsem-spinlock.c b/kernel/locking/rwsem-spinlock.c
index 2c93571162cb7573f17a1eb7a0a424e07b061a25..2555ae15ec14c78d6c8f5030fea52daa74b5a5c9 100644 (file)
--- a/kernel/locking/rwsem-spinlock.c
+++ b/kernel/locking/rwsem-spinlock.c
@@ -154,7 +154,7 @@ void __sched __down_read(struct rw_semaphore *sem)
                set_task_state(tsk, TASK_UNINTERRUPTIBLE);
        }
 
-       tsk->state = TASK_RUNNING;
+       __set_task_state(tsk, TASK_RUNNING);
  out:
        ;
 }

diff --git a/kernel/locking/rwsem-xadd.c b/kernel/locking/rwsem-xadd.c
index 7628c3fc37ca30902a6952fd86ffd4387e70eb57..2f7cc4076f50aa0c534c22e527ab3d1f11ce9a66 100644 (file)
--- a/kernel/locking/rwsem-xadd.c
+++ b/kernel/locking/rwsem-xadd.c
@@ -242,8 +242,7 @@ struct rw_semaphore __sched *rwsem_down_read_failed(struct rw_semaphore *sem)
                schedule();
        }
 
-       tsk->state = TASK_RUNNING;
-
+       __set_task_state(tsk, TASK_RUNNING);
        return sem;
 }
 EXPORT_SYMBOL(rwsem_down_read_failed);