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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-05-12 02:38:10 +0400 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-05-12 19:28:57 +0400 |
| commit | 7cbbb758d3c93b24b45b169af55440d2e7d5b7f6 (patch) | |
| tree | 2eda8bad7a0f92c67b2255e9076e892309e85011 | |
| parent | 1201e7e67634624aec89317cf308cd0d3d8d4770 (diff) | |
| download | linux-7cbbb758d3c93b24b45b169af55440d2e7d5b7f6.tar.xz | |
Input: remove useless synchronize_rcu() calls
There is no need to call synchronize_rcu() after a list insertion,
or a NULL->ptr assignment.
However, the reverse operations do need this call.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
| -rw-r--r-- | drivers/input/evdev.c | 2 | ||||
| -rw-r--r-- | drivers/input/input.c | 1 | ||||
| -rw-r--r-- | drivers/input/joydev.c | 1 | ||||
| -rw-r--r-- | drivers/input/mousedev.c | 1 |
4 files changed, 0 insertions, 5 deletions
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index 75c4e8683033..be0921ef6b52 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -164,7 +164,6 @@ static int evdev_grab(struct evdev *evdev, struct evdev_client *client) return error; rcu_assign_pointer(evdev->grab, client); - synchronize_rcu(); return 0; } @@ -187,7 +186,6 @@ static void evdev_attach_client(struct evdev *evdev, spin_lock(&evdev->client_lock); list_add_tail_rcu(&client->node, &evdev->client_list); spin_unlock(&evdev->client_lock); - synchronize_rcu(); } static void evdev_detach_client(struct evdev *evdev, diff --git a/drivers/input/input.c b/drivers/input/input.c index ebbceedc92f4..75e11c7b70fd 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -451,7 +451,6 @@ int input_grab_device(struct input_handle *handle) } rcu_assign_pointer(dev->grab, handle); - synchronize_rcu(); out: mutex_unlock(&dev->mutex); diff --git a/drivers/input/joydev.c b/drivers/input/joydev.c index 5688b5c88f24..c24ec2d5f926 100644 --- a/drivers/input/joydev.c +++ b/drivers/input/joydev.c @@ -180,7 +180,6 @@ static void joydev_attach_client(struct joydev *joydev, spin_lock(&joydev->client_lock); list_add_tail_rcu(&client->node, &joydev->client_list); spin_unlock(&joydev->client_lock); - synchronize_rcu(); } static void joydev_detach_client(struct joydev *joydev, diff --git a/drivers/input/mousedev.c b/drivers/input/mousedev.c index 7630273e9474..257e033986e4 100644 --- a/drivers/input/mousedev.c +++ b/drivers/input/mousedev.c @@ -508,7 +508,6 @@ static void mousedev_attach_client(struct mousedev *mousedev, spin_lock(&mousedev->client_lock); list_add_tail_rcu(&client->node, &mousedev->client_list); spin_unlock(&mousedev->client_lock); - synchronize_rcu(); } static void mousedev_detach_client(struct mousedev *mousedev, |