diff options
| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2017-05-17 08:48:19 +0900 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-05-17 07:25:01 +0200 |
| commit | e76bf3c4b4e456fa8f2c729fa1e8c644857529a8 (patch) | |
| tree | 6d9252579928b84f65556478fe7701ed6cfa707e /sound/core/oss/pcm_plugin.c | |
| parent | b55f9fdcd3f0b3da7c9d4b6c67d75a1878653221 (diff) | |
ALSA: pcm/oss: refer to parameters instead of copying to reduce usage of kernel stack
Some functions in compatibility layer for Open Sound System interface has
local variable to copy some parameters in runtime of PCM substream, while
this can be replaced with reference of pointers to parameter itself. This
brings an advantage to reduce usage of kernel stack.
This commit applies this idea.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/oss/pcm_plugin.c')
| -rw-r--r-- | sound/core/oss/pcm_plugin.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sound/core/oss/pcm_plugin.c b/sound/core/oss/pcm_plugin.c index 727ac44d39f4..cadc93792868 100644 --- a/sound/core/oss/pcm_plugin.c +++ b/sound/core/oss/pcm_plugin.c @@ -266,7 +266,8 @@ snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *plug, snd_pc return frames; } -static int snd_pcm_plug_formats(struct snd_mask *mask, snd_pcm_format_t format) +static int snd_pcm_plug_formats(const struct snd_mask *mask, + snd_pcm_format_t format) { struct snd_mask formats = *mask; u64 linfmts = (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 | @@ -309,7 +310,7 @@ static snd_pcm_format_t preferred_formats[] = { }; snd_pcm_format_t snd_pcm_plug_slave_format(snd_pcm_format_t format, - struct snd_mask *format_mask) + const struct snd_mask *format_mask) { int i; |