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Subject: Re: [PATCH] x86/entry: Improve system call entry comments
To: Andy Lutomirski <luto@amacapital.net>
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Cc: Ingo Molnar <mingo@kernel.org>, Andy Lutomirski <luto@kernel.org>,
        X86 ML <x86@kernel.org>,
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        Borislav Petkov <bp@alien8.de>, Oleg Nesterov <oleg@redhat.com>,
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        Brian Gerst <brgerst@gmail.com>,
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From: "H. Peter Anvin" <hpa@zytor.com>
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Date: Tue, 8 Mar 2016 10:47:43 -0800
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On 03/08/16 10:45, Andy Lutomirski wrote:
> 
> s/modern/most, perhaps?
> 
> I'm hoping that some day Bionic goes away and gets replaced by musl.
> 
> Of course, musl doesn't always use fast syscalls because it needs a
> vdso facility that doesn't currently exist.  I'll deal with that
> eventually.
> 

You don't actually need actual DSO support to support fast system calls
on i386.  Even klibc uses them now, and the additional code to support
it is trivial.

	-hpa