linux-kernel - Re: [PATCH v2 1/5] coresight: Remove unused function parameter

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Date:   Wed, 31 Aug 2022 09:11:14 +0100
From:   Mike Leach <mike.leach@...aro.org>
To:     James Clark <james.clark@....com>
Cc:     suzuki.poulose@....com, coresight@...ts.linaro.org,
        mathieu.poirier@...aro.org, leo.yan@...aro.org,
        linux-kernel@...r.kernel.org, german.gomez@....com,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH v2 1/5] coresight: Remove unused function parameter

On Tue, 30 Aug 2022 at 18:26, James Clark <james.clark@....com> wrote:
>
> The ability to use a custom function in this sysfs show function isn't
> used so remove it.
>
> No functional changes.
>
> Signed-off-by: James Clark <james.clark@....com>
> ---
>  drivers/hwtracing/coresight/coresight-priv.h | 16 ++++------------
>  1 file changed, 4 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h
> index ff1dd2092ac5..f2458b794ef3 100644
> --- a/drivers/hwtracing/coresight/coresight-priv.h
> +++ b/drivers/hwtracing/coresight/coresight-priv.h
> @@ -40,31 +40,23 @@
>  #define ETM_MODE_EXCL_KERN     BIT(30)
>  #define ETM_MODE_EXCL_USER     BIT(31)
>
> -typedef u32 (*coresight_read_fn)(const struct device *, u32 offset);
> -#define __coresight_simple_func(type, func, name, lo_off, hi_off)      \
> +#define __coresight_simple_show(type, name, lo_off, hi_off)            \
>  static ssize_t name##_show(struct device *_dev,                                \
>                            struct device_attribute *attr, char *buf)    \
>  {                                                                      \
>         type *drvdata = dev_get_drvdata(_dev->parent);                  \
> -       coresight_read_fn fn = func;                                    \
>         u64 val;                                                        \
>         pm_runtime_get_sync(_dev->parent);                              \
> -       if (fn)                                                         \
> -               val = (u64)fn(_dev->parent, lo_off);                    \
> -       else                                                            \
> -               val = coresight_read_reg_pair(drvdata->base,            \
> -                                                lo_off, hi_off);       \
> +       val = coresight_read_reg_pair(drvdata->base, lo_off, hi_off);   \
>         pm_runtime_put_sync(_dev->parent);                              \
>         return scnprintf(buf, PAGE_SIZE, "0x%llx\n", val);              \
>  }                                                                      \
>  static DEVICE_ATTR_RO(name)
>
> -#define coresight_simple_func(type, func, name, offset)                        \
> -       __coresight_simple_func(type, func, name, offset, -1)
>  #define coresight_simple_reg32(type, name, offset)                     \
> -       __coresight_simple_func(type, NULL, name, offset, -1)
> +       __coresight_simple_show(type, name, offset, -1)
>  #define coresight_simple_reg64(type, name, lo_off, hi_off)             \
> -       __coresight_simple_func(type, NULL, name, lo_off, hi_off)
> +       __coresight_simple_show(type, name, lo_off, hi_off)
>
>  extern const u32 coresight_barrier_pkt[4];
>  #define CORESIGHT_BARRIER_PKT_SIZE (sizeof(coresight_barrier_pkt))
> --
> 2.28.0
>

Reviewed-by: Mike Leach <mike.leach@...aro.org>

-- 
Mike Leach
Principal Engineer, ARM Ltd.
Manchester Design Centre. UK