linux-kernel - Re: [PATCH -next] coresight: core: Make symbol 'csdev

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Date:   Fri, 9 Apr 2021 14:35:07 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     Wei Yongjun <weiyongjun1@...wei.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc:     coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Hulk Robot <hulkci@...wei.com>
Subject: Re: [PATCH -next] coresight: core: Make symbol 'csdev_sink' static



On 4/9/21 7:02 AM, Wei Yongjun wrote:
> The sparse tool complains as follows:
> 
> drivers/hwtracing/coresight/coresight-core.c:26:1: warning:
>  symbol '__pcpu_scope_csdev_sink' was not declared. Should it be static?
> 
> This symbol is not used outside of coresight-core.c, so this
> commit marks it static.

commit ? It is not on the tree yet. s/commit/change instead.

> 
> Fixes: 2cd87a7b293d ("coresight: core: Add support for dedicated percpu sinks")

There is no functional problem that this patch is proposing to fix
and hence the "Fixes:" tag is not warranted. Suzuki/Matihieu ?

> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
> ---
>  drivers/hwtracing/coresight/coresight-core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c
> index 3e779e1619ed..6c68d34d956e 100644
> --- a/drivers/hwtracing/coresight/coresight-core.c
> +++ b/drivers/hwtracing/coresight/coresight-core.c
> @@ -23,7 +23,7 @@
>  #include "coresight-priv.h"
>  
>  static DEFINE_MUTEX(coresight_mutex);
> -DEFINE_PER_CPU(struct coresight_device *, csdev_sink);
> +static DEFINE_PER_CPU(struct coresight_device *, csdev_sink);
>  
>  /**
>   * struct coresight_node - elements of a path, from source to sink
> 

Otherwise LGTM. As csdev_sink is not being used outside coresight-core.c
file after the introduction of coresight_[set|get]_percpu_sink() helpers.