linux-kernel - Re: What's in asm-generic.git

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Message-ID: <10f740e80912110454u172fc2cfye30da6ca0e0f0af0@mail.gmail.com>
Date:	Fri, 11 Dec 2009 13:54:01 +0100
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Mike Frysinger <vapier.adi@...il.com>, liqin.chen@...plusct.com,
	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: What's in asm-generic.git

On Thu, Dec 10, 2009 at 22:25, Arnd Bergmann <arnd@...db.de> wrote:
> On Thursday 10 December 2009, Mike Frysinger wrote:
>> > I have found now that sys_accept4 was missing. sys_set_thread_area however
>> > is only defined on x86 and mips. Since you don't currently implement this
>> > on score, maybe it would be more appropriate to handle it like the other
>> > architectures do, rather than adding it to asm-generic/unistd.h?
>>
>> isnt the point of asm-generic/unistd.h to collect all common syscalls
>> ?  if there's syscalls that ideally should be handled by everyone but
>> currently doesnt, then it's easy to define it in the header but have
>> the actual entry.S leave it as a hole ...
>
> Well, sys_thread_area is not a common syscall but rather an exception.
> I haven't looked at how glibc does implents TLS on different architectures,
> but I think this is commonly done purely in user space without the
> need for a syscall.

10+ architectures already have sys_[sg]et_thread_area of have reserved
entries for it.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds
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