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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-10-26 19:17:44 +0400 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-02-21 11:50:17 +0400 |
| commit | a53efe5ff88d0283bae8a2c2fa066d0fff31dc91 (patch) | |
| tree | 8b500f9df4ad79e7159ad08ec8231278166eb499 | |
| parent | 56f15e518cfdc732bd4e4da90e0c9cf2fc4e7c1b (diff) | |
| download | linux-a53efe5ff88d0283bae8a2c2fa066d0fff31dc91.tar.xz | |
sched/mm: call finish_arch_post_lock_switch in idle_task_exit and use_mm
The finish_arch_post_lock_switch is called at the end of the task
switch after all locks have been released. In concept it is paired
with the switch_mm function, but the current code only does the
call in finish_task_switch. Add the call to idle_task_exit and
use_mm. One use case for the additional calls is s390 which will
use finish_arch_post_lock_switch to wait for the completion of
TLB flush operations.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | kernel/sched/core.c | 4 | ||||
| -rw-r--r-- | mm/mmu_context.c | 3 |
2 files changed, 6 insertions, 1 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index b46131ef6aab..4b0739c9558e 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4692,8 +4692,10 @@ void idle_task_exit(void) BUG_ON(cpu_online(smp_processor_id())); - if (mm != &init_mm) + if (mm != &init_mm) { switch_mm(mm, &init_mm, current); + finish_arch_post_lock_switch(); + } mmdrop(mm); } diff --git a/mm/mmu_context.c b/mm/mmu_context.c index 8a8cd0265e52..f802c2d216a7 100644 --- a/mm/mmu_context.c +++ b/mm/mmu_context.c @@ -31,6 +31,9 @@ void use_mm(struct mm_struct *mm) tsk->mm = mm; switch_mm(active_mm, mm, tsk); task_unlock(tsk); +#ifdef finish_arch_post_lock_switch + finish_arch_post_lock_switch(); +#endif if (active_mm != mm) mmdrop(active_mm); |