linux-kernel - Re: [PATCH] ARM: Mark ret_fast

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Date:	Thu, 6 Aug 2015 10:08:03 -0700
From:	Drew Richardson <drew.richardson@....com>
To:	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	Dave P Martin <Dave.Martin@....com>,
	"christoffer.dall@...aro.org" <christoffer.dall@...aro.org>,
	"nico@...aro.org" <nico@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:	Wade Cherry <Wade.Cherry@....com>, pawel.moll@....com
Subject: Re: [PATCH] ARM: Mark ret_fast_syscall as a function

On Tue, Jul 14, 2015 at 01:45:57PM +0100, Drew Richardson wrote:
> ret_fast_syscall runs when user space makes a syscall. However it
> needs to be marked as such so the ELF information is correct. Before
> it was:
> 
>    101: 8000f300     0 NOTYPE  LOCAL  DEFAULT    2 ret_fast_syscall
> 
> But with this change it correctly shows as:
> 
>    101: 8000f300    96 FUNC    LOCAL  DEFAULT    2 ret_fast_syscall
> 
> I see this function when using perf to unwind call stacks from kernel
> space to user space. Without this change I would need to add some
> special case logic when using the vmlinux ELF information.
> 
> Signed-off-by: Drew Richardson <drew.richardson@....com>

I haven't heard any further comments on this, did this get merged and
I just didn't notice? Or did I forget to add someone?

Thanks,

Drew
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