On Thu, Jun 25, 2015 at 10:53:37AM -0700, Anshul Garg wrote:
> From: Anshul Garg <[email protected]>
>
> input_dev_release_keys : Use for_each_set_bit instead
> of testing every bit upto KEY_MAX as it is more clean
> and more optimized.
>
> input_estimate_events_per_packet : Use bitmap_weight
> to get set bits count for EV_REL type instead of using
> loop and also use for_each_set_bit for EV_ABS event for
> more optimized code.
>
> Signed-off-by: Anshul Garg <[email protected]>
> ---
> drivers/input/input.c | 28 ++++++++++------------------
> 1 file changed, 10 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/input/input.c b/drivers/input/input.c
> index e0b7b8e..9459f8b 100644
> --- a/drivers/input/input.c
> +++ b/drivers/input/input.c
> @@ -682,12 +682,9 @@ static void input_dev_release_keys(struct input_dev *dev)
> int code;
>
> if (is_event_supported(EV_KEY, dev->evbit, EV_MAX)) {
> - for (code = 0; code <= KEY_MAX; code++) {
> - if (is_event_supported(code, dev->keybit, KEY_MAX) &&
> - __test_and_clear_bit(code, dev->key)) {
> - input_pass_event(dev, EV_KEY, code, 0);
> - }
> - }
> + for_each_set_bit(code, dev->keybit, KEY_MAX)
That should have been KEY_CNT (as KEY_MAX is a valid keycode and you do
not want to skip it), I fixed it up locally and applied.
Thanks.
> + input_pass_event(dev, EV_KEY, code, 0);
> + memset(dev->key, 0, sizeof(dev->key));
> input_pass_event(dev, EV_SYN, SYN_REPORT, 1);
> }
> }
> @@ -1986,21 +1983,16 @@ static unsigned int
> input_estimate_events_per_packet(struct input_dev *dev)
> events = mt_slots + 1; /* count SYN_MT_REPORT and SYN_REPORT */
>
> if (test_bit(EV_ABS, dev->evbit)) {
> - for (i = 0; i < ABS_CNT; i++) {
> - if (test_bit(i, dev->absbit)) {
> - if (input_is_mt_axis(i))
> - events += mt_slots;
> - else
> - events++;
> - }
> + for_each_set_bit(i, dev->absbit, ABS_CNT) {
> + if (input_is_mt_axis(i))
> + events += mt_slots;
> + else
> + events++;
> }
> }
>
> - if (test_bit(EV_REL, dev->evbit)) {
> - for (i = 0; i < REL_CNT; i++)
> - if (test_bit(i, dev->relbit))
> - events++;
> - }
> + if (test_bit(EV_REL, dev->evbit))
> + events += bitmap_weight(dev->relbit, REL_CNT);
>
> /* Make room for KEY and MSC events */
> events += 7;
> --
> 1.7.9.5
>
>
> ---
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--
Dmitry
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