linux-kernel - Re: [PATCH] events: core: make perf_pmu_snapshot

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Date:   Tue, 8 Jun 2021 19:20:14 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Pavel Skripkin <paskripkin@...il.com>
Cc:     mingo@...hat.com, acme@...nel.org,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] events: core: make perf_pmu_snapshot_aux static

On Tue, Jun 08, 2021 at 07:22:53PM +0300, Pavel Skripkin wrote:
> Sparse says:
>   warning: symbol 'perf_pmu_snapshot_aux' was not declared. Should it be static?
> 
> Since perf_pmu_snapshot_aux() is not used outside this file,
> it can be made static
> 
> Signed-off-by: Pavel Skripkin <paskripkin@...il.com>
> ---
>  kernel/events/core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/events/core.c b/kernel/events/core.c
> index 6fee4a7e88d7..0d98d6a6f949 100644
> --- a/kernel/events/core.c
> +++ b/kernel/events/core.c
> @@ -6667,7 +6667,7 @@ static unsigned long perf_prepare_sample_aux(struct perf_event *event,
>  	return data->aux_size;
>  }
>  
> -long perf_pmu_snapshot_aux(struct perf_buffer *rb,
> +static long perf_pmu_snapshot_aux(struct perf_buffer *rb,
>  			   struct perf_event *event,
>  			   struct perf_output_handle *handle,
>  			   unsigned long size)

You've just ruined the alignment of the arguments, also you subject has
the wrong prefix, see to git log for suggestions.