locking/rwbase: Properly match set_and_save_state() to restore_state()

Noticed while looking at the readers race.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lkml.kernel.org/r/20210909110203.828203010@infradead.org

diff --git a/kernel/locking/rwbase_rt.c b/kernel/locking/rwbase_rt.c
index 4ba1508..542b017 100644 (file)
--- a/kernel/locking/rwbase_rt.c
+++ b/kernel/locking/rwbase_rt.c
@@ -220,7 +220,7 @@ static int __sched rwbase_write_lock(struct rwbase_rt *rwb,
        for (; atomic_read(&rwb->readers);) {
                /* Optimized out for rwlocks */
                if (rwbase_signal_pending_state(state, current)) {
-                       __set_current_state(TASK_RUNNING);
+                       rwbase_restore_current_state();
                        __rwbase_write_unlock(rwb, 0, flags);
                        return -EINTR;
                }