linux-kernel - Re: [PATCH 1/7] coresight: Rename coresight_{set,clear}_claim

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Message-ID: <20250313112457.GO9682@e132581.arm.com>
Date: Thu, 13 Mar 2025 11:24:57 +0000
From: Leo Yan <leo.yan@....com>
To: James Clark <james.clark@...aro.org>
Cc: lcherian@...vell.com, coresight@...ts.linaro.org,
	Mike Leach <mike.leach@...aro.org>,
	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-kernel@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH 1/7] coresight: Rename coresight_{set,clear}_claim_tags()

On Tue, Feb 11, 2025 at 10:39:37AM +0000, James Clark wrote:
> 
> These look like they set the whole tags register as one value, but they
> only set and clear the self hosted bit using a SET/CLR bits mechanism.
> Rename the functions to reflect this better.
> 
> Signed-off-by: James Clark <james.clark@...aro.org>

Reviewed-by: Leo Yan <leo.yan@....com>

> ---
>  drivers/hwtracing/coresight/coresight-core.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c
> index 0a9380350fb5..523dbb381f90 100644
> --- a/drivers/hwtracing/coresight/coresight-core.c
> +++ b/drivers/hwtracing/coresight/coresight-core.c
> @@ -142,14 +142,14 @@ static inline bool coresight_is_claimed_any(struct coresight_device *csdev)
>         return coresight_read_claim_tags(csdev) != 0;
>  }
> 
> -static inline void coresight_set_claim_tags(struct coresight_device *csdev)
> +static inline void coresight_set_self_claim_tag(struct coresight_device *csdev)
>  {
>         csdev_access_relaxed_write32(&csdev->access, CORESIGHT_CLAIM_SELF_HOSTED,
>                                      CORESIGHT_CLAIMSET);
>         isb();
>  }
> 
> -static inline void coresight_clear_claim_tags(struct coresight_device *csdev)
> +static inline void coresight_clear_self_claim_tag(struct coresight_device *csdev)
>  {
>         csdev_access_relaxed_write32(&csdev->access, CORESIGHT_CLAIM_SELF_HOSTED,
>                                      CORESIGHT_CLAIMCLR);
> @@ -174,11 +174,11 @@ int coresight_claim_device_unlocked(struct coresight_device *csdev)
>         if (coresight_is_claimed_any(csdev))
>                 return -EBUSY;
> 
> -       coresight_set_claim_tags(csdev);
> +       coresight_set_self_claim_tag(csdev);
>         if (coresight_is_claimed_self_hosted(csdev))
>                 return 0;
> -       /* There was a race setting the tags, clean up and fail */
> -       coresight_clear_claim_tags(csdev);
> +       /* There was a race setting the tag, clean up and fail */
> +       coresight_clear_self_claim_tag(csdev);
>         return -EBUSY;
>  }
>  EXPORT_SYMBOL_GPL(coresight_claim_device_unlocked);
> @@ -199,7 +199,7 @@ int coresight_claim_device(struct coresight_device *csdev)
>  EXPORT_SYMBOL_GPL(coresight_claim_device);
> 
>  /*
> - * coresight_disclaim_device_unlocked : Clear the claim tags for the device.
> + * coresight_disclaim_device_unlocked : Clear the claim tag for the device.
>   * Called with CS_UNLOCKed for the component.
>   */
>  void coresight_disclaim_device_unlocked(struct coresight_device *csdev)
> @@ -209,7 +209,7 @@ void coresight_disclaim_device_unlocked(struct coresight_device *csdev)
>                 return;
> 
>         if (coresight_is_claimed_self_hosted(csdev))
> -               coresight_clear_claim_tags(csdev);
> +               coresight_clear_self_claim_tag(csdev);
>         else
>                 /*
>                  * The external agent may have not honoured our claim
> --
> 2.34.1
> 
> _______________________________________________
> CoreSight mailing list -- coresight@...ts.linaro.org
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