linux-kernel - Re: microblaze syscall list

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Message-ID: <481C8B48.5020306@redhat.com>
Date:	Sat, 03 May 2008 08:56:56 -0700
From:	Ulrich Drepper <drepper@...hat.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	John Williams <john.williams@...alogix.com>, monstr@...nam.cz,
	Matthew Wilcox <matthew@....cx>,
	Will Newton <will.newton@...il.com>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	linux-arch@...r.kernel.org, git@...inx.com,
	Stephen Neuendorffer <stephen.neuendorffer@...inx.com>,
	John Linn <John.Linn@...inx.com>
Subject: Re: microblaze syscall list

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Arnd Bergmann wrote:
> Uli: The question at hand is what syscalls a new linux architecture
> should implement. To take utimes() as an example, the kernel currently
> has utime(), utimes(), futimesat() and utimensat(), while glibc
> provides utime(), utimes(), futimes(), futimesat(), futimens() and
> utimensat(). In theory, all the glibc interfaces could be provided
> on top of the utimensat() syscall, but should they?

Yes, this is how it should be.  It's not done because no architecture
glibc officially supports arrived after these and similar syscalls
arrived.  There is no need to implement the not-*at interface, no need
to implement the creat syscall, etc etc.

- --
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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