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Input: remove useless synchronize_rcu() calls

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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>
This commit is contained in:
Eric Dumazet 2011-05-11 15:38:10 -07:00 committed by Dmitry Torokhov
parent 1201e7e676
commit 7cbbb758d3
4 changed files with 0 additions and 5 deletions
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2
drivers/input/evdev.c
View File

@ -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,

1
drivers/input/input.c
View File

@ -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);

1
drivers/input/joydev.c
View File

@ -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,

1
drivers/input/mousedev.c
View File

@ -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,