diff options
| author | Maxime Ripard <mripard@kernel.org> | 2019-10-03 09:59:29 +0200 |
|---|---|---|
| committer | Maxime Ripard <mripard@kernel.org> | 2019-10-03 09:59:29 +0200 |
| commit | 77fdaa091d79c87323a9f3912a25f73e02ea2a01 (patch) | |
| tree | 0e47e2d3c4a966277dbaec075f4685187fdae482 /include/linux/rcuwait.h | |
| parent | e2c4ed148cf3ec8669a1d90dc66966028e5fad70 (diff) | |
| parent | 54ecb8f7028c5eb3d740bb82b0f1d90f2df63c5c (diff) | |
Merge drm/drm-fixes into drm-misc-fixes
We haven't backmerged for a while, let's start the -rc period by pulling
rc1.
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Diffstat (limited to 'include/linux/rcuwait.h')
| -rw-r--r-- | include/linux/rcuwait.h | 20 |
1 files changed, 4 insertions, 16 deletions
diff --git a/include/linux/rcuwait.h b/include/linux/rcuwait.h index 563290fc194f..75c97e4bbc57 100644 --- a/include/linux/rcuwait.h +++ b/include/linux/rcuwait.h @@ -6,16 +6,11 @@ /* * rcuwait provides a way of blocking and waking up a single - * task in an rcu-safe manner; where it is forbidden to use - * after exit_notify(). task_struct is not properly rcu protected, - * unless dealing with rcu-aware lists, ie: find_task_by_*(). + * task in an rcu-safe manner. * - * Alternatively we have task_rcu_dereference(), but the return - * semantics have different implications which would break the - * wakeup side. The only time @task is non-nil is when a user is - * blocked (or checking if it needs to) on a condition, and reset - * as soon as we know that the condition has succeeded and are - * awoken. + * The only time @task is non-nil is when a user is blocked (or + * checking if it needs to) on a condition, and reset as soon as we + * know that the condition has succeeded and are awoken. */ struct rcuwait { struct task_struct __rcu *task; @@ -37,13 +32,6 @@ extern void rcuwait_wake_up(struct rcuwait *w); */ #define rcuwait_wait_event(w, condition) \ ({ \ - /* \ - * Complain if we are called after do_exit()/exit_notify(), \ - * as we cannot rely on the rcu critical region for the \ - * wakeup side. \ - */ \ - WARN_ON(current->exit_state); \ - \ rcu_assign_pointer((w)->task, current); \ for (;;) { \ /* \ |