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ALSA: pcm: More helper macros for reducing snd_pcm_format_t cast

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snd_pcm_format_t is a strong-typed integer and requires the explicit
cast with __force if converted or compared with a normal integer
value.  Since most of use cases do iterate over all formats and test /
set the mask, provide a couple of new helper macros that do the
explicit cast.

Link: https://lore.kernel.org/r/20200206163945.6797-3-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
2020-02-06 17:39:39 +01:00
parent 8c356c524a
commit b9c7d41087
2 changed files with 16 additions and 0 deletions
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9
include/sound/pcm.h
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@@ -1415,6 +1415,15 @@ static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format)
return 1ULL << (__force int) pcm_format;
}
/**
* pcm_for_each_format - helper to iterate for each format type
* @f: the iterator variable in snd_pcm_format_t type
*/
#define pcm_for_each_format(f) \
for ((f) = SNDRV_PCM_FORMAT_FIRST; \
(__force int)(f) <= (__force int)SNDRV_PCM_FORMAT_LAST; \
(f) = (__force snd_pcm_format_t)((__force int)(f) + 1))
/* printk helpers */
#define pcm_err(pcm, fmt, args...) \
dev_err((pcm)->card->dev, fmt, ##args)