linux-kernel - Re: [GIT PULL, v4] S+core architecture (arch/score) support

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Date:	Mon, 31 Aug 2009 15:48:33 +0800
From:	liqin.chen@...plusct.com
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org
Subject: Re: [GIT PULL, v4] S+core architecture (arch/score) support

Arnd Bergmann <arnd@...db.de> 写于 2009-08-27 22:00:37:

> 
> I understand your problem here, and I think it would be good
> to have second opinion from someone else here. The four
> #defines you mention are roughly in reverse order of importance.
> 
> I think you really need to remove __ARCH_WANT_SYSCALL_DEPRECATED
> and get that working. Please tell us if some system call is
> giving you problems and we can find a solution together.
> 
> Removing __ARCH_WANT_SYSCALL_OFF_T should not be too hard, because
> glibc uses the loff_t versions by default anyway. I have not tried
> it though, so it may be more complicated than I thought.
> 

in __ARCH_WANT_SYSCALL_DEPRECATED,
asm-generic/unistd.h haven't define __NR_ipc and __NR__llseek
which used in glibc.

Now we have maintained 3 sets of syscall API code use for glibc.
1: Old syscall interface, which linux/score system work well.
2: New syscall interface, define all 4 macro __ARCH_WANT_SYSCALL_XXX,
        linux/score system work now, but we still debug the glibc code.
3: New syscall interface, without define __ARCH_WANT_SYSCALL_DEPRECATED
        and __ARCH_WANT_SYSCALL_OFF_T, linux/score system couldn't work.
        because glibc have many place need to fix.

Liqin