Date:   Thu, 23 Jun 2022 10:11:29 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     mangosteen728 <mangosteen728@...il.com>
Cc:     ast <ast@...nel.org>, andrii <andrii@...nel.org>,
        bpf <bpf@...r.kernel.org>, daniel <daniel@...earbox.net>,
        BigBro Young <hi.youthinker@...il.com>,
        netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] bpf/samples: fix tbpf_perf_event_output cpu's bug

On Thu, Jun 23, 2022 at 02:19:50AM +0800, mangosteen728 wrote:
> For the third parameter of this function,
> whose flags is set to 0, the perf_buffer__poll remains blocked.
> The flags value of BPF_F_CURRENT_CPU can receive the data normally.
> 
> Signed-off-by: mangosteen728 <mangosteen728@...il.com>
> ---
>  Hi Greg KH:
>  I am sorry for the wrong patch submitted due to my network reasons
>  and causing unnecessary trouble to the audit.
>  thanks
>  mangosteen728
> 
>  samples/bpf/trace_output_kern.c | 2 +-
>  1 files changed, 1 insertion(+), 1 deletions(-)
> 
> diff --git a/samples/bpf/trace_output_kern.c b/samples/bpf/trace_output_
> kern.c
> index b64815a..926844e 100644
> --- a/samples/bpf/trace_output_kern.c
> +++ b/samples/bpf/trace_output_kern.c
> @@ -22,7 +22,7 @@ int bpf_prog1(struct pt_regs *ctx)
>   data.pid = bpf_get_current_pid_tgid();
>   data.cookie = 0x12345678;
> 
> - bpf_perf_event_output(ctx, &my_map, 0, &data, sizeof(data));
> + bpf_perf_event_output(ctx, &my_map, BPF_F_CURRENT_CPU, &data,
> sizeof(data));
> 
>   return 0;
>  }
> -- 
> 1.8.3.1

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.

You are receiving this message because of the following common error(s)
as indicated below:

- Your patch is malformed (tabs converted to spaces, linewrapped, etc.)
  and can not be applied.  Please read the file,
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- You did not specify a description of why the patch is needed, or
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  section entitled "The canonical patch format" in the kernel file,
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  properly describe the change.

- You did not write a descriptive Subject: for the patch, allowing Greg,
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  the section entitled "The canonical patch format" in the kernel file,
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- It looks like you did not use your "real" name for the patch on either
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- This looks like a new version of a previously submitted patch, but you
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  Please read the section entitled "The canonical patch format" in the
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If you wish to discuss this problem further, or you have questions about
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Greg will reply once he has dug out from the pending patches received
from other developers.

thanks,

greg k-h's patch email bot

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