[alsa-devel] [PATCH] alsa: add annotations to bitwise type snd_pcm_hw_param_t

Fully half of all alsa sparse warnings are from snd_pcm_hw_param_t degrading to integer type, this goes a long way towards eliminating them.

Signed-off-by: Harvey Harrison harvey.harrison@gmail.com --- include/sound/asound.h | 12 ++++++++---- include/sound/pcm.h | 32 ++++++++++++++++---------------- 2 files changed, 24 insertions(+), 20 deletions(-)

diff --git a/include/sound/asound.h b/include/sound/asound.h index 3eaf155..0309da2 100644 --- a/include/sound/asound.h +++ b/include/sound/asound.h @@ -302,6 +302,8 @@ typedef int __bitwise snd_pcm_hw_param_t; #define SNDRV_PCM_HW_PARAM_SUBFORMAT ((__force snd_pcm_hw_param_t) 2) /* Subformat */ #define SNDRV_PCM_HW_PARAM_FIRST_MASK SNDRV_PCM_HW_PARAM_ACCESS #define SNDRV_PCM_HW_PARAM_LAST_MASK SNDRV_PCM_HW_PARAM_SUBFORMAT +#define SNDRV_PCM_HW_PARAM_MASK_INDEX(var) \ + ((__force int)(var) - (__force int)SNDRV_PCM_HW_PARAM_FIRST_MASK)

#define SNDRV_PCM_HW_PARAM_SAMPLE_BITS ((__force snd_pcm_hw_param_t) 8) /* Bits per sample */ #define SNDRV_PCM_HW_PARAM_FRAME_BITS ((__force snd_pcm_hw_param_t) 9) /* Bits per frame */ @@ -317,6 +319,8 @@ typedef int __bitwise snd_pcm_hw_param_t; #define SNDRV_PCM_HW_PARAM_TICK_TIME ((__force snd_pcm_hw_param_t) 19) /* Approx tick duration in us */ #define SNDRV_PCM_HW_PARAM_FIRST_INTERVAL SNDRV_PCM_HW_PARAM_SAMPLE_BITS #define SNDRV_PCM_HW_PARAM_LAST_INTERVAL SNDRV_PCM_HW_PARAM_TICK_TIME +#define SNDRV_PCM_HW_PARAM_INTERVAL_INDEX(var) \ + ((__force int)(var) - (__force int)SNDRV_PCM_HW_PARAM_FIRST_INTERVAL)

#define SNDRV_PCM_HW_PARAMS_NORESAMPLE (1<<0) /* avoid rate resampling */

@@ -336,11 +340,11 @@ struct snd_mask {

struct snd_pcm_hw_params { unsigned int flags; - struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; + struct snd_mask masks[ + SNDRV_PCM_HW_PARAM_MASK_INDEX(SNDRV_PCM_HW_PARAM_LAST_MASK) + 1]; struct snd_mask mres[5]; /* reserved masks */ - struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; + struct snd_interval intervals[ + SNDRV_PCM_HW_PARAM_INTERVAL_INDEX(SNDRV_PCM_HW_PARAM_LAST_INTERVAL) + 1]; struct snd_interval ires[9]; /* reserved intervals */ unsigned int rmask; /* W: requested masks */ unsigned int cmask; /* R: changed masks */ diff --git a/include/sound/pcm.h b/include/sound/pcm.h index 51d58cc..5315b53 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -209,10 +209,10 @@ struct snd_pcm_hw_rule { };

struct snd_pcm_hw_constraints { - struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; - struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; + struct snd_mask masks[ + SNDRV_PCM_HW_PARAM_MASK_INDEX(SNDRV_PCM_HW_PARAM_LAST_MASK) + 1]; + struct snd_interval intervals[ + SNDRV_PCM_HW_PARAM_INTERVAL_INDEX(SNDRV_PCM_HW_PARAM_LAST_INTERVAL) + 1]; unsigned int rules_num; unsigned int rules_all; struct snd_pcm_hw_rule *rules; @@ -221,13 +221,13 @@ struct snd_pcm_hw_constraints { static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, snd_pcm_hw_param_t var) { - return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; + return &constrs->masks[SNDRV_PCM_HW_PARAM_MASK_INDEX(var)]; }

static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, snd_pcm_hw_param_t var) { - return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; + return &constrs->intervals[SNDRV_PCM_HW_PARAM_INTERVAL_INDEX(var)]; }

struct snd_ratnum { @@ -761,40 +761,40 @@ static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, substream->runtime->trigger_master = master; }

-static inline int hw_is_mask(int var) +static inline int hw_is_mask(snd_pcm_hw_param_t var) { - return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && - var <= SNDRV_PCM_HW_PARAM_LAST_MASK; + return (__force int)var >= (__force int)SNDRV_PCM_HW_PARAM_FIRST_MASK && + (__force int)var <= (__force int)SNDRV_PCM_HW_PARAM_LAST_MASK; }

-static inline int hw_is_interval(int var) +static inline int hw_is_interval(snd_pcm_hw_param_t var) { - return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && - var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; + return (__force int)var >= (__force int)SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && + (__force int)var <= (__force int)SNDRV_PCM_HW_PARAM_LAST_INTERVAL; }

static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var) { - return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; + return &params->masks[SNDRV_PCM_HW_PARAM_MASK_INDEX(var)]; }

static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var) { - return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; + return &params->intervals[SNDRV_PCM_HW_PARAM_INTERVAL_INDEX(var)]; }

static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var) { - return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; + return &params->masks[SNDRV_PCM_HW_PARAM_MASK_INDEX(var)]; }

static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var) { - return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; + return &params->intervals[SNDRV_PCM_HW_PARAM_INTERVAL_INDEX(var)]; }

#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))