From 748912f350f659361cadd9f02c5663f7f8945710 Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Fri, 15 Jul 2016 09:23:17 +0900 Subject: mixer: remove alloca() from elem_write_switch() Both of alloca() and automatic variables keep storages on stack, while the former generates more instructions than the latter. It's better to use the latter if the size of storage is computable at pre-compile or compile time; i.e. just for structures. This commit obsolete usages of alloca() with automatic variables. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- src/mixer/simple_none.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/src/mixer/simple_none.c b/src/mixer/simple_none.c index d0e800e6..c1f2b295 100644 --- a/src/mixer/simple_none.c +++ b/src/mixer/simple_none.c @@ -483,17 +483,16 @@ static int elem_write_volume(selem_none_t *s, int dir, selem_ctl_type_t type) static int elem_write_switch(selem_none_t *s, int dir, selem_ctl_type_t type) { - snd_ctl_elem_value_t *ctl; + snd_ctl_elem_value_t ctl = {0}; unsigned int idx; int err; selem_ctl_t *c = &s->ctls[type]; - snd_ctl_elem_value_alloca(&ctl); - if ((err = snd_hctl_elem_read(c->elem, ctl)) < 0) + if ((err = snd_hctl_elem_read(c->elem, &ctl)) < 0) return err; for (idx = 0; idx < c->values; idx++) - snd_ctl_elem_value_set_integer(ctl, idx, + snd_ctl_elem_value_set_integer(&ctl, idx, !!(s->str[dir].sw & (1 << idx))); - if ((err = snd_hctl_elem_write(c->elem, ctl)) < 0) + if ((err = snd_hctl_elem_write(c->elem, &ctl)) < 0) return err; return 0; } -- cgit v1.2.1