Groups > linux.kernel > #1201918

Re: [PATCH] ARM: Mark ret_fast_syscall as a function

From	Drew Richardson <drew.richardson@arm.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] ARM: Mark ret_fast_syscall as a function
Date	2015-08-06 19:10 +0200
Message-ID	<pUwQ1-6WB-3@gated-at.bofh.it> (permalink)
References	<pMzi2-75l-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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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@arm.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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Re: [PATCH] ARM: Mark ret_fast_syscall as a function Drew Richardson <drew.richardson@arm.com> - 2015-08-06 19:10 +0200
  Re: [PATCH] ARM: Mark ret_fast_syscall as a function Nicolas Pitre <nicolas.pitre@linaro.org> - 2015-08-06 19:40 +0200
    Re: [PATCH] ARM: Mark ret_fast_syscall as a function Drew Richardson <drew.richardson@arm.com> - 2015-08-06 20:00 +0200

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