Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[karo-tx-linux.git] / kernel / sched / core.c

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 24beb9bb4c3e228ac17e8b931f37c44091987d18..e67a6e88e125e551d5d08c9b914a79ecbc3c5417 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2773,7 +2773,7 @@ need_resched:
        preempt_disable();
        cpu = smp_processor_id();
        rq = cpu_rq(cpu);
-       rcu_note_context_switch(cpu);
+       rcu_note_context_switch();
        prev = rq->curr;
 
        schedule_debug(prev);
@@ -2874,10 +2874,14 @@ asmlinkage __visible void __sched schedule_user(void)
         * or we have been woken up remotely but the IPI has not yet arrived,
         * we haven't yet exited the RCU idle mode. Do it here manually until
         * we find a better solution.
+        *
+        * NB: There are buggy callers of this function.  Ideally we
+        * should warn if prev_state != IN_USER, but that will trigger
+        * too frequently to make sense yet.
         */
-       user_exit();
+       enum ctx_state prev_state = exception_enter();
        schedule();
-       user_enter();
+       exception_exit(prev_state);
 }
 #endif