Re: [PATCH v3] media: ABS macro parameter parenthesization

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Hi Dan,

On Sun, Dec 24, 2017 at 11:03:08PM -0500, Dan Gopstein wrote:
> From: Dan Gopstein <dgopstein@xxxxxxx>
> 
> Replace usages of the locally defined ABS() macro with calls to the
> canonical abs() from kernel.h and remove the old definitions of ABS()

The note about some wrong ABS() macro implementations that the previous patch 
version had is still useful, I believe.

baruch

> 
> Signed-off-by: Dan Gopstein <dgopstein@xxxxxxx>
> ---
> v2->v3:
> * replace local ABS() with kernel's abs()
> 
> v1->v2:
> * unmangled the patch
> * added example to commit text
> 
>  drivers/media/dvb-frontends/dib0090.c        | 4 ++--
>  drivers/media/dvb-frontends/dib7000p.c       | 2 +-
>  drivers/media/dvb-frontends/dib8000.c        | 2 +-
>  drivers/media/dvb-frontends/dibx000_common.h | 2 --
>  drivers/media/dvb-frontends/mb86a16.c        | 8 +++-----
>  drivers/media/dvb-frontends/stv0367_priv.h   | 1 -
>  drivers/media/dvb-frontends/stv0900_priv.h   | 1 -
>  drivers/media/dvb-frontends/stv0900_sw.c     | 6 +++---
>  8 files changed, 10 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/media/dvb-frontends/dib0090.c b/drivers/media/dvb-frontends/dib0090.c
> index d9d730d..633a961 100644
> --- a/drivers/media/dvb-frontends/dib0090.c
> +++ b/drivers/media/dvb-frontends/dib0090.c
> @@ -1285,7 +1285,7 @@ int dib0090_gain_control(struct dvb_frontend *fe)
>  #endif
>  
>  			if (*tune_state == CT_AGC_STEP_1) {	/* quickly go to the correct range of the ADC power */
> -				if (ABS(adc_error) < 50 || state->agc_step++ > 5) {
> +				if (abs(adc_error) < 50 || state->agc_step++ > 5) {
>  
>  #ifdef CONFIG_STANDARD_DAB
>  					if (state->fe->dtv_property_cache.delivery_system == STANDARD_DAB) {
> @@ -1754,7 +1754,7 @@ static int dib0090_dc_offset_calibration(struct dib0090_state *state, enum front
>  			*tune_state = CT_TUNER_STEP_1;
>  		} else {
>  			/* the minimum was what we have seen in the step before */
> -			if (ABS(state->adc_diff) > ABS(state->min_adc_diff)) {
> +			if (abs(state->adc_diff) > abs(state->min_adc_diff)) {
>  				dprintk("Since adc_diff N = %d  > adc_diff step N-1 = %d, Come back one step\n", state->adc_diff, state->min_adc_diff);
>  				state->step--;
>  			}
> diff --git a/drivers/media/dvb-frontends/dib7000p.c b/drivers/media/dvb-frontends/dib7000p.c
> index 0fbaabe..6fc34b3 100644
> --- a/drivers/media/dvb-frontends/dib7000p.c
> +++ b/drivers/media/dvb-frontends/dib7000p.c
> @@ -809,7 +809,7 @@ static int dib7000p_set_dds(struct dib7000p_state *state, s32 offset_khz)
>  {
>  	u32 internal = dib7000p_get_internal_freq(state);
>  	s32 unit_khz_dds_val;
> -	u32 abs_offset_khz = ABS(offset_khz);
> +	u32 abs_offset_khz = abs(offset_khz);
>  	u32 dds = state->cfg.bw->ifreq & 0x1ffffff;
>  	u8 invert = !!(state->cfg.bw->ifreq & (1 << 25));
>  	if (internal == 0) {
> diff --git a/drivers/media/dvb-frontends/dib8000.c b/drivers/media/dvb-frontends/dib8000.c
> index 5d93815..4680a8b 100644
> --- a/drivers/media/dvb-frontends/dib8000.c
> +++ b/drivers/media/dvb-frontends/dib8000.c
> @@ -2677,7 +2677,7 @@ static void dib8000_viterbi_state(struct dib8000_state *state, u8 onoff)
>  static void dib8000_set_dds(struct dib8000_state *state, s32 offset_khz)
>  {
>  	s16 unit_khz_dds_val;
> -	u32 abs_offset_khz = ABS(offset_khz);
> +	u32 abs_offset_khz = abs(offset_khz);
>  	u32 dds = state->cfg.pll->ifreq & 0x1ffffff;
>  	u8 invert = !!(state->cfg.pll->ifreq & (1 << 25));
>  	u8 ratio;
> diff --git a/drivers/media/dvb-frontends/dibx000_common.h b/drivers/media/dvb-frontends/dibx000_common.h
> index 8784af9..12b58f5 100644
> --- a/drivers/media/dvb-frontends/dibx000_common.h
> +++ b/drivers/media/dvb-frontends/dibx000_common.h
> @@ -223,8 +223,6 @@ struct dvb_frontend_parametersContext {
>  
>  #define FE_CALLBACK_TIME_NEVER 0xffffffff
>  
> -#define ABS(x) ((x < 0) ? (-x) : (x))
> -
>  #define DATA_BUS_ACCESS_MODE_8BIT                 0x01
>  #define DATA_BUS_ACCESS_MODE_16BIT                0x02
>  #define DATA_BUS_ACCESS_MODE_NO_ADDRESS_INCREMENT 0x10
> diff --git a/drivers/media/dvb-frontends/mb86a16.c b/drivers/media/dvb-frontends/mb86a16.c
> index dfe322e..ced59f9 100644
> --- a/drivers/media/dvb-frontends/mb86a16.c
> +++ b/drivers/media/dvb-frontends/mb86a16.c
> @@ -31,8 +31,6 @@
>  static unsigned int verbose = 5;
>  module_param(verbose, int, 0644);
>  
> -#define ABS(x)		((x) < 0 ? (-x) : (x))
> -
>  struct mb86a16_state {
>  	struct i2c_adapter		*i2c_adap;
>  	const struct mb86a16_config	*config;
> @@ -1201,12 +1199,12 @@ static int mb86a16_set_fe(struct mb86a16_state *state)
>  
>  			signal_dupl = 0;
>  			for (j = 0; j < prev_freq_num; j++) {
> -				if ((ABS(prev_swp_freq[j] - swp_freq)) < (swp_ofs * 3 / 2)) {
> +				if ((abs(prev_swp_freq[j] - swp_freq)) < (swp_ofs * 3 / 2)) {
>  					signal_dupl = 1;
>  					dprintk(verbose, MB86A16_INFO, 1, "Probably Duplicate Signal, j = %d", j);
>  				}
>  			}
> -			if ((signal_dupl == 0) && (swp_freq > 0) && (ABS(swp_freq - state->frequency * 1000) < fcp + state->srate / 6)) {
> +			if ((signal_dupl == 0) && (swp_freq > 0) && (abs(swp_freq - state->frequency * 1000) < fcp + state->srate / 6)) {
>  				dprintk(verbose, MB86A16_DEBUG, 1, "------ Signal detect ------ [swp_freq=[%07d, srate=%05d]]", swp_freq, state->srate);
>  				prev_swp_freq[prev_freq_num] = swp_freq;
>  				prev_freq_num++;
> @@ -1380,7 +1378,7 @@ static int mb86a16_set_fe(struct mb86a16_state *state)
>  			dprintk(verbose, MB86A16_INFO, 1, "SWEEP Frequency = %d", swp_freq);
>  			swp_freq += delta_freq;
>  			dprintk(verbose, MB86A16_INFO, 1, "Adjusting .., DELTA Freq = %d, SWEEP Freq=%d", delta_freq, swp_freq);
> -			if (ABS(state->frequency * 1000 - swp_freq) > 3800) {
> +			if (abs(state->frequency * 1000 - swp_freq) > 3800) {
>  				dprintk(verbose, MB86A16_INFO, 1, "NO  --  SIGNAL !");
>  			} else {
>  
> diff --git a/drivers/media/dvb-frontends/stv0367_priv.h b/drivers/media/dvb-frontends/stv0367_priv.h
> index 8abc451..460066a 100644
> --- a/drivers/media/dvb-frontends/stv0367_priv.h
> +++ b/drivers/media/dvb-frontends/stv0367_priv.h
> @@ -35,7 +35,6 @@
>  #endif
>  
>  /* MACRO definitions */
> -#define ABS(X) ((X) < 0 ? (-1 * (X)) : (X))
>  #define MAX(X, Y) ((X) >= (Y) ? (X) : (Y))
>  #define MIN(X, Y) ((X) <= (Y) ? (X) : (Y))
>  #define INRANGE(X, Y, Z) \
> diff --git a/drivers/media/dvb-frontends/stv0900_priv.h b/drivers/media/dvb-frontends/stv0900_priv.h
> index 7a95f95..97c1237 100644
> --- a/drivers/media/dvb-frontends/stv0900_priv.h
> +++ b/drivers/media/dvb-frontends/stv0900_priv.h
> @@ -24,7 +24,6 @@
>  
>  #include <linux/i2c.h>
>  
> -#define ABS(X) ((X) < 0 ? (-1 * (X)) : (X))
>  #define INRANGE(X, Y, Z) ((((X) <= (Y)) && ((Y) <= (Z))) \
>  		|| (((Z) <= (Y)) && ((Y) <= (X))) ? 1 : 0)
>  
> diff --git a/drivers/media/dvb-frontends/stv0900_sw.c b/drivers/media/dvb-frontends/stv0900_sw.c
> index c97a391..d406c83 100644
> --- a/drivers/media/dvb-frontends/stv0900_sw.c
> +++ b/drivers/media/dvb-frontends/stv0900_sw.c
> @@ -1255,14 +1255,14 @@ fe_stv0900_signal_type stv0900_get_signal_params(struct dvb_frontend *fe)
>  		else
>  			intp->freq[d] = stv0900_get_tuner_freq(fe);
>  
> -		if (ABS(offsetFreq) <= ((intp->srch_range[d] / 2000) + 500))
> +		if (abs(offsetFreq) <= ((intp->srch_range[d] / 2000) + 500))
>  			range = STV0900_RANGEOK;
> -		else if (ABS(offsetFreq) <=
> +		else if (abs(offsetFreq) <=
>  				(stv0900_carrier_width(result->symbol_rate,
>  						result->rolloff) / 2000))
>  			range = STV0900_RANGEOK;
>  
> -	} else if (ABS(offsetFreq) <= ((intp->srch_range[d] / 2000) + 500))
> +	} else if (abs(offsetFreq) <= ((intp->srch_range[d] / 2000) + 500))
>  		range = STV0900_RANGEOK;
>  
>  	dprintk("%s: range %d\n", __func__, range);
> -- 
> 2.7.4
> 

-- 
     http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
=}------------------------------------------------ooO--U--Ooo------------{=
   - baruch@xxxxxxxxxx - tel: +972.2.679.5364, http://www.tkos.co.il -



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