linux-kernel - Re: [Uclinux-dist-devel] Re: [PATCH] Blackfin arch: add some missing syscall

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Date:	Thu, 13 Sep 2007 13:03:25 +0200
From:	Bernd Schmidt <bernds_cb1@...nline.de>
To:	bryan.wu@...log.com
CC:	Mike Frysinger <vapier.adi@...il.com>, bernd.schmidt@...log.com,
	linux-arch@...r.kernel.org, Matthew Wilcox <matthew@....cx>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Paul Mundt <lethal@...ux-sh.org>,
	uclinux-dist-devel@...ckfin.uclinux.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [Uclinux-dist-devel] Re: [PATCH] Blackfin arch: add some missing
 syscall

Bryan Wu wrote:
>>> but mremap doesn't -- there's even an implementation in mm/nommu.c.
>>> Could you check the rest of these over to see if they truly don't need
>>> to be implemented for no-mmu?
>> you're right we want mremap, my fault
>>
> 
> Yes, I do think so, both sys_mremap and sys_munmap are implemented in
> mm/nommu.c. How do think of this, Bernd?

There's a mremap in nommu.c, but it doesn't do a lot that is useful. 
With some further mm changes in our tree, it's little more than a fancy 
way of saying munmap, and uClibc does not use it, so there's no 
compelling need to have it in userspace.


Bernd
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