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| author |   Davidlohr Bueso <dave@stgolabs.net> | 2015-01-19 17:39:21 -0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2015-02-04 07:57:33 +0100 |
| commit | 51587bcf31d070119d37de6103543c807f5ccdb3 (patch) | |
| tree | f4d0686f20ce90cad1a57aea2f752097e4263595 /kernel | |
| parent | Merge tag 'v3.19-rc7' into locking/core, to refresh the branch before applying new changes (diff) | |
| download | linux-dev-51587bcf31d070119d37de6103543c807f5ccdb3.tar.xz linux-dev-51587bcf31d070119d37de6103543c807f5ccdb3.zip | |
locking/mutex: Explicitly mark task as running after wakeup
By the time we wake up and get the lock after being asleep
in the slowpath, we better be running. As good practice,
be explicit about this and avoid any mischief.
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: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1421717961.4903.11.camel@stgolabs.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/locking/mutex.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c index c67a60b61625..57407062e209 100644 --- a/kernel/locking/mutex.c +++ b/kernel/locking/mutex.c @@ -587,6 +587,8 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass, schedule_preempt_disabled(); spin_lock_mutex(&lock->wait_lock, flags); } + __set_task_state(task, TASK_RUNNING); + mutex_remove_waiter(lock, &waiter, current_thread_info()); /* set it to 0 if there are no waiters left: */ if (likely(list_empty(&lock->wait_list))) |