[ALSA] add struct snd_pcm_substream forward declaration
fixes: include/sound/pcm.h:62: warning: 'struct snd_pcm_substream' declared inside parameter list Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
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@ -56,6 +56,8 @@ struct snd_pcm_hardware {
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size_t fifo_size; /* fifo size in bytes */
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};
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struct snd_pcm_substream;
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struct snd_pcm_ops {
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int (*open)(struct snd_pcm_substream *substream);
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int (*close)(struct snd_pcm_substream *substream);
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