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vt: keyboard, use find_next_bit in kbd_match

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Instead of a 'for' loop with 'test_bit's to find a bit in a range, use
find_next_bit to achieve the same in a simpler and faster manner.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20201029113222.32640-16-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2020-10-29 12:32:21 +01:00 committed by Greg Kroah-Hartman
parent 6dee84d6be
commit 2389cdc360
1 changed files with 6 additions and 8 deletions
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14
drivers/tty/vt/keyboard.c
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@ -1535,18 +1535,16 @@ static void kbd_event(struct input_handle *handle, unsigned int event_type,
static bool kbd_match(struct input_handler *handler, struct input_dev *dev)
{
int i;
if (test_bit(EV_SND, dev->evbit))
return true;
if (test_bit(EV_KEY, dev->evbit)) {
for (i = KEY_RESERVED; i < BTN_MISC; i++)
if (test_bit(i, dev->keybit))
return true;
for (i = KEY_BRL_DOT1; i <= KEY_BRL_DOT10; i++)
if (test_bit(i, dev->keybit))
return true;
if (find_next_bit(dev->keybit, BTN_MISC, KEY_RESERVED) <
BTN_MISC)
return true;
if (find_next_bit(dev->keybit, KEY_BRL_DOT10 + 1,
KEY_BRL_DOT1) <= KEY_BRL_DOT10)
return true;
}
return false;