linux-kernel - Re: [PATCH] remove timerd() syscall number

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Message-ID: <20070917210216.284780@gmx.net>
Date:	Mon, 17 Sep 2007 23:02:16 +0200
From:	"Michael Kerrisk" <mtk-manpages@....net>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	corbet@....net, jengelh@...putergmbh.de, hch@....de,
	stable@...nel.org, drepper@...hat.com,
	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
	tglx@...utronix.de, rdunlap@...otime.net, vda.linux@...glemail.com,
	davidel@...ilserver.org
Subject: Re: [PATCH] remove timerd() syscall number

> > I hope I've done this right...  This patch, against 2.6.23-rc6,
> > removes the timerfd() syscall (which in any case had a bug
> > on its 2.6.22 release) from all architectures, so that we
> > can have some breathing space to think about the API design.
> > All of the existing timerfd() code is left intact.
> 
> I think a minimally-intrusive implementation would be
> 
> --- a/fs/timerfd.c~a
> +++ a/fs/timerfd.c
> @@ -159,6 +159,8 @@ asmlinkage long sys_timerfd(int ufd, int
>  	struct inode *inode;
>  	struct itimerspec ktmr;
>  
> +	return -ENOSYS;
> +
>  	if (copy_from_user(&ktmr, utmr, sizeof(ktmr)))
>  		return -EFAULT;
>  
> _
> 
> or, better,
> 
> --- a/init/Kconfig~a
> +++ a/init/Kconfig
> @@ -491,6 +491,7 @@ config SIGNALFD
>  
>  config TIMERFD
>  	bool "Enable timerfd() system call" if EMBEDDED
> +	depends on BROKEN
>  	select ANON_INODES
>  	default y
>  	help
> _

Cough!  Right then.  I take it you'll apply one of those then?
-- 
Michael Kerrisk
maintainer of Linux man pages Sections 2, 3, 4, 5, and 7 

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