From: Thomas Gleixner Date: Sat, 1 Apr 2017 12:50:59 +0200 Subject: [PATCH 136/353] rtmutex: Make lock_killable work Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=837062c3b2e57ec5d4c04c8b1cda3305c2c010f2 Locking an rt mutex killable does not work because signal handling is restricted to TASK_INTERRUPTIBLE. Use signal_pending_state() unconditionaly. Cc: stable-rt@vger.kernel.org Signed-off-by: Thomas Gleixner Signed-off-by: Sebastian Andrzej Siewior --- kernel/locking/rtmutex.c | 19 +++++++------------ 1 file changed, 7 insertions(+), 12 deletions(-) diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c index 81bae2e3d82e..333c4b7aa8e8 100644 --- a/kernel/locking/rtmutex.c +++ b/kernel/locking/rtmutex.c @@ -1201,18 +1201,13 @@ __rt_mutex_slowlock(struct rt_mutex *lock, int state, if (try_to_take_rt_mutex(lock, current, waiter)) break; - /* - * TASK_INTERRUPTIBLE checks for signals and - * timeout. Ignored otherwise. - */ - if (likely(state == TASK_INTERRUPTIBLE)) { - /* Signal pending? */ - if (signal_pending(current)) - ret = -EINTR; - if (timeout && !timeout->task) - ret = -ETIMEDOUT; - if (ret) - break; + if (timeout && !timeout->task) { + ret = -ETIMEDOUT; + break; + } + if (signal_pending_state(state, current)) { + ret = -EINTR; + break; } raw_spin_unlock_irq(&lock->wait_lock);