3.18.91-rt98-rc1 stable review patch. If anyone has any objections, please let me know.
------------------ From: Thomas Gleixner <[email protected]> Locking an rt mutex killable does not work because signal handling is restricted to TASK_INTERRUPTIBLE. Use signal_pending_state() unconditionaly. Cc: [email protected] Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Sebastian Andrzej Siewior <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]> --- 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 8d950b4521fc..da35f7ef5324 100644 --- a/kernel/locking/rtmutex.c +++ b/kernel/locking/rtmutex.c @@ -1532,18 +1532,13 @@ __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 (unlikely(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; } if (ww_ctx && ww_ctx->acquired > 0) { -- 2.13.2
