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| author | Takashi Iwai <tiwai@suse.de> | 2020-02-06 17:39:39 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2020-02-10 08:27:08 +0100 |
| commit | b9c7d41087bc1755e01f9584f0bdbce0bb8b195d (patch) | |
| tree | 8961ab76f08c65e5d14939351bc1e96cfabe78b5 /include/sound/pcm.h | |
| parent | ALSA: aloop: Fix PCM format assignment (diff) | |
| download | linux-b9c7d41087bc1755e01f9584f0bdbce0bb8b195d.tar.xz linux-b9c7d41087bc1755e01f9584f0bdbce0bb8b195d.zip | |
ALSA: pcm: More helper macros for reducing snd_pcm_format_t cast
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>
Diffstat (limited to 'include/sound/pcm.h')
| -rw-r--r-- | include/sound/pcm.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h index f657ff08f317..31a4b300e4c9 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -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) |