[ALSA] Revert "alsa: add annotations to bitwise type snd_pcm_hw_param_t"

This reverts commit 36b34d2437104f323e09d7c6af6451d3c0b9c0cd.

From: Al Viro <viro@ZenIV.linux.org.uk>

WIW, *all* this stuff is not bitwise at all.  For crying out loud, half
of these types are routinely used as array indices and loop variables...

If anything, we want a different set of allowed operations - subtraction
between elements of type (yielding integer), addition/subtraction of
integer types not bigger than ours (yielding our type), comparisons,
assignments (=, +=, -=, passing to function as argument, return from
function, initializers) and second/third arguments in ?:.  With 0 *not*
being allowed as a constant of such type.

It's not bitwise; we may use the same infrastructure in sparse, but it
should be a separate class of types (__attribute__((affine))).

dma_addr_t is another candidate for the same treatment, but there we'll
need helpers for conversions to hw-acceptable form (dma_to_le32(), etc.)
and gradual conversion of drivers.

ALSA ones and pm mess are absolutely straightforward cases, though.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

2 files changed, 20 insertions, 24 deletions

diff --git a/include/sound/asound.h b/include/sound/asound.h
index 0309da2..3eaf155 100644
--- a/include/sound/asound.h
+++ b/include/sound/asound.h
@@ -302,8 +302,6 @@ 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 */
@@ -319,8 +317,6 @@ 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 */
 
@@ -340,11 +336,11 @@ struct snd_mask {
 
 struct snd_pcm_hw_params {
 	unsigned int flags;
-	struct snd_mask masks[
-		SNDRV_PCM_HW_PARAM_MASK_INDEX(SNDRV_PCM_HW_PARAM_LAST_MASK) + 1];
+	struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - 
+			       SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
 	struct snd_mask mres[5];	/* reserved masks */
-	struct snd_interval intervals[
-		SNDRV_PCM_HW_PARAM_INTERVAL_INDEX(SNDRV_PCM_HW_PARAM_LAST_INTERVAL) + 1];
+	struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
+				        SNDRV_PCM_HW_PARAM_FIRST_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 5315b53..51d58cc 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_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];
+	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];
 	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[SNDRV_PCM_HW_PARAM_MASK_INDEX(var)];
+	return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
 }
 
 static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
 						    snd_pcm_hw_param_t var)
 {
-	return &constrs->intervals[SNDRV_PCM_HW_PARAM_INTERVAL_INDEX(var)];
+	return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
 }
 
 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(snd_pcm_hw_param_t var)
+static inline int hw_is_mask(int var)
 {
-	return (__force int)var >= (__force int)SNDRV_PCM_HW_PARAM_FIRST_MASK &&
-		(__force int)var <= (__force int)SNDRV_PCM_HW_PARAM_LAST_MASK;
+	return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
+		var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
 }
 
-static inline int hw_is_interval(snd_pcm_hw_param_t var)
+static inline int hw_is_interval(int var)
 {
-	return (__force int)var >= (__force int)SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
-		(__force int)var <= (__force int)SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
+	return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
+		var <= 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[SNDRV_PCM_HW_PARAM_MASK_INDEX(var)];
+	return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
 }
 
 static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
 					     snd_pcm_hw_param_t var)
 {
-	return &params->intervals[SNDRV_PCM_HW_PARAM_INTERVAL_INDEX(var)];
+	return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
 }
 
 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[SNDRV_PCM_HW_PARAM_MASK_INDEX(var)];
+	return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
 }
 
 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[SNDRV_PCM_HW_PARAM_INTERVAL_INDEX(var)];
+	return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
 }
 
 #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))