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ALSA: pcm: Build OSS writev/readv helpers conditionally

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The snd_pcm_oss_writev3() and snd_pcm_oss_readv3() are used only in
io.c with CONFIG_SND_PCM_OSS_PLUGINS=y.  Add an ifdef to reduce the
build of these functions.

Along with it, since they are called always for in-kernel copy, reduce
the argument and call snd_pcm_kernel_writev() and *_readv() directly
instead.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2017-05-21 19:08:57 +02:00
parent 13f72c8c28
commit fed5794fcc
3 changed files with 10 additions and 12 deletions
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4
sound/core/oss/io.c
View File

@ -26,9 +26,9 @@
#include "pcm_plugin.h"
#define pcm_write(plug,buf,count) snd_pcm_oss_write3(plug,buf,count,1)
#define pcm_writev(plug,vec,count) snd_pcm_oss_writev3(plug,vec,count,1)
#define pcm_writev(plug,vec,count) snd_pcm_oss_writev3(plug,vec,count)
#define pcm_read(plug,buf,count) snd_pcm_oss_read3(plug,buf,count,1)
#define pcm_readv(plug,vec,count) snd_pcm_oss_readv3(plug,vec,count,1)
#define pcm_readv(plug,vec,count) snd_pcm_oss_readv3(plug,vec,count)
/*
* Basic io plugin

12
sound/core/oss/pcm_oss.c
View File

@ -1232,7 +1232,8 @@ snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *p
return ret;
}
snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
{
struct snd_pcm_runtime *runtime = substream->runtime;
int ret;
@ -1249,8 +1250,7 @@ snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void
if (ret < 0)
break;
}
ret = __snd_pcm_lib_xfer(substream, bufs, false, frames,
in_kernel);
ret = snd_pcm_kernel_writev(substream, bufs, frames);
if (ret != -EPIPE && ret != -ESTRPIPE)
break;
@ -1262,7 +1262,7 @@ snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void
return ret;
}
snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
{
struct snd_pcm_runtime *runtime = substream->runtime;
int ret;
@ -1283,13 +1283,13 @@ snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void *
if (ret < 0)
break;
}
ret = __snd_pcm_lib_xfer(substream, bufs, false, frames,
in_kernel);
ret = snd_pcm_kernel_readv(substream, bufs, frames);
if (ret != -EPIPE && ret != -ESTRPIPE)
break;
}
return ret;
}
#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
{

6
sound/core/oss/pcm_plugin.h
View File

@ -162,11 +162,9 @@ snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream,
snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream,
char *ptr, snd_pcm_uframes_t size, int in_kernel);
snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream,
void **bufs, snd_pcm_uframes_t frames,
int in_kernel);
void **bufs, snd_pcm_uframes_t frames);
snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream,
void **bufs, snd_pcm_uframes_t frames,
int in_kernel);
void **bufs, snd_pcm_uframes_t frames);
#else