linux-kernel - Re: [PATCH v2 0/5] coresight: Reduce duplicated sysfs accessors

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Date:   Wed, 31 Aug 2022 10:58:23 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     James Clark <james.clark@....com>
Cc:     suzuki.poulose@....com, coresight@...ts.linaro.org,
        mike.leach@...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 0/5] coresight: Reduce duplicated sysfs accessors

I have applied this set.

Thanks,
Mathieu

On Tue, Aug 30, 2022 at 06:26:08PM +0100, James Clark wrote:
> Changes since v1:
> 
>   * Keep existing signed offset value types until the very last commit
>     and then remove them all at once
> 
>   * Also split out usages of read_pair() and read32() into separate
>     functions in the last commit 
> 
>   * Whitespace fixes
> 
>   * Replaced any touched scnprintf() with sysfs_emit()
> 
> ======
> 
> The intent of this change is to reduce the large number identical of
> functions created by macros for sysfs accessors. It's possible to re-use
> the same function but pass in the register to access as an argument.
> This reduces the size of the coresight modules folder by 244KB.
> 
> The first two patches are refactors to simplify and remove some dead
> code, and the second two are the changes to use a shared function.
> 
> Testing
> =======
> 
> No changes in any of the outputs:
> 
>   cat /sys/bus/coresight/devices/*/mgmt/* > before.txt
>   cat /sys/bus/coresight/devices/*/mgmt/* > after.txt
>   diff before.txt after.txt
> 
> With the following modules loaded:
> 
>   ls /sys/bus/coresight/devices/
>   etm0  etm2  funnel0  funnel2  replicator0  tmc_etf0  tmc_etf2  tpiu0
>   etm1  etm3  funnel1  funnel3  stm0         tmc_etf1  tmc_etr0
> 
> 
> James Clark (5):
>   coresight: Remove unused function parameter
>   coresight: Simplify sysfs accessors by using csdev_access abstraction
>   coresight: Re-use same function for similar sysfs register accessors
>   coresight: cti-sysfs: Re-use same functions for similar sysfs register
>     accessors
>   coresight: Make new csdev_access offsets unsigned
> 
>  drivers/hwtracing/coresight/coresight-catu.c  |  27 +--
>  drivers/hwtracing/coresight/coresight-catu.h  |   8 +-
>  drivers/hwtracing/coresight/coresight-core.c  |  28 +++
>  .../hwtracing/coresight/coresight-cti-sysfs.c | 213 +++++++-----------
>  drivers/hwtracing/coresight/coresight-etb10.c |  28 +--
>  .../coresight/coresight-etm3x-sysfs.c         |  34 +--
>  drivers/hwtracing/coresight/coresight-priv.h  |  74 +++---
>  .../coresight/coresight-replicator.c          |  10 +-
>  drivers/hwtracing/coresight/coresight-stm.c   |  40 +---
>  .../hwtracing/coresight/coresight-tmc-core.c  |  48 ++--
>  drivers/hwtracing/coresight/coresight-tmc.h   |   4 +-
>  include/linux/coresight.h                     |  23 ++
>  12 files changed, 227 insertions(+), 310 deletions(-)
> 
> -- 
> 2.28.0
>