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Re: [PATCH] x86/entry: Improve system call entry comments

From "H. Peter Anvin" <hpa@zytor.com>
Newsgroups linux.kernel
Subject Re: [PATCH] x86/entry: Improve system call entry comments
Date 2016-03-08 19:50 +0100
Message-ID <rauRH-4OA-3@gated-at.bofh.it> (permalink)
References <r9KYy-8f9-3@gated-at.bofh.it> <r9YI9-oh-9@gated-at.bofh.it> <ra6mm-5hg-11@gated-at.bofh.it> <randx-84x-39@gated-at.bofh.it>
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On 03/08/16 02:30, Ingo Molnar wrote:
>>>> + *
>>>> + * This is considered a slow path.  It is not used by modern libc
>>>> + * implementations on modern hardware except during process startup.
>>>> + *
>>
>> Sadly I believe Android still uses int $0x80 in the upstream version.
> 
> I don't see how that fact conflicts with my statement: on 64-bit kernels INT $0x80 
> will (of course) work, but will land on another entry point: entry_INT80_compat(), 
> not entry_INT80_32().
> 
> On 32-bit kernels the INT $0x80 entry point is entry_INT80_32().
> 

It doesn't.  I was referring to the above quote. Trying to fix that.

	-hpa

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Thread

[PATCH] x86/entry: Improve system call entry comments Andy Lutomirski <luto@kernel.org> - 2016-03-06 18:50 +0100
  Re: [PATCH] x86/entry: Improve system call entry comments Ingo Molnar <mingo@kernel.org> - 2016-03-07 09:30 +0100
    Re: [PATCH] x86/entry: Improve system call entry comments "H. Peter Anvin" <hpa@zytor.com> - 2016-03-07 17:40 +0100
      Re: [PATCH] x86/entry: Improve system call entry comments Ingo Molnar <mingo@kernel.org> - 2016-03-08 11:40 +0100
        Re: [PATCH] x86/entry: Improve system call entry comments "H. Peter Anvin" <hpa@zytor.com> - 2016-03-08 19:50 +0100
          Re: [PATCH] x86/entry: Improve system call entry comments Andy Lutomirski <luto@amacapital.net> - 2016-03-08 20:00 +0100
            Re: [PATCH] x86/entry: Improve system call entry comments "H. Peter Anvin" <hpa@zytor.com> - 2016-03-08 20:10 +0100
              Re: [PATCH] x86/entry: Improve system call entry comments Andy Lutomirski <luto@amacapital.net> - 2016-03-08 20:20 +0100
        Re: [PATCH] x86/entry: Improve system call entry comments "H. Peter Anvin" <hpa@zytor.com> - 2016-03-08 19:50 +0100
          Re: [PATCH] x86/entry: Improve system call entry comments Andy Lutomirski <luto@amacapital.net> - 2016-03-08 19:50 +0100
    Re: [PATCH] x86/entry: Improve system call entry comments Andy Lutomirski <luto@amacapital.net> - 2016-03-07 18:10 +0100
      Re: [PATCH] x86/entry: Improve system call entry comments Ingo Molnar <mingo@kernel.org> - 2016-03-08 11:30 +0100
        Re: [PATCH] x86/entry: Improve system call entry comments Andy Lutomirski <luto@amacapital.net> - 2016-03-08 19:40 +0100

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