linux-kernel - Re: [PATCH v2] gcov: add support for GCC 4.9

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Date:	Tue, 13 May 2014 13:22:07 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Yuan Pengfei" <yuanpf12@....pku.edu.cn>
Cc:	"'Peter Oberparleiter'" <oberpar@...ux.vnet.ibm.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] gcov: add support for GCC 4.9

On Tue, 13 May 2014 08:31:36 +0800 "Yuan Pengfei" <yuanpf12@....pku.edu.cn> wrote:

> From: Yuan Pengfei <coolypf@...com>
> 
> This patch handles the gcov-related changes in GCC 4.9:
>   A new counter (time profile) is added.
> See http://gcc.gnu.org/gcc-4.9/changes.html

That link doesn't describe __gcov_merge_time_profile() and a quick web
search didn't turn up anything terribly useful.

> --- a/kernel/gcov/base.c
> +++ b/kernel/gcov/base.c
> @@ -85,6 +85,12 @@ void __gcov_merge_ior(gcov_type *counters, unsigned int
> n_counters)
>  }
>  EXPORT_SYMBOL(__gcov_merge_ior);
>  
> +void __gcov_merge_time_profile(gcov_type *counters, unsigned int
> n_counters)
> +{
> +	/* Unused. */
> +}
> +EXPORT_SYMBOL(__gcov_merge_time_profile);

So it would be useful for you to describe this change within the patch
changelog so that others can understand and review it.

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