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touchpad: use ffs instead of a manual count

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BTN_TOOL_FINGER, DOUBLETAP, etc. are mutually exclusive in the kernel, so we
can use ffs here instead of manually counting.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Peter Hutterer 2014-12-12 12:14:13 +10:00
parent 99cb908722
commit dc3d9315fe
1 changed files with 1 additions and 10 deletions
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11
src/evdev-mt-touchpad.c
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@ -138,17 +138,8 @@ tp_get_touch(struct tp_dispatch *tp, unsigned int slot)
static inline unsigned int
tp_fake_finger_count(struct tp_dispatch *tp)
{
unsigned int fake_touches, nfake_touches;
/* don't count BTN_TOUCH */
fake_touches = tp->fake_touches >> 1;
nfake_touches = 0;
while (fake_touches) {
nfake_touches++;
fake_touches >>= 1;
}
return nfake_touches;
return ffs(tp->fake_touches >> 1);
}
static inline bool