linux-kernel - Re: a question regarding sys_poll() on x86

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Date:	Thu, 15 Sep 2011 10:44:13 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Thomas Meyer <thomas@...3r.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	viro@...iv.linux.org.uk, mingo@...hat.com
Subject: Re: a question regarding sys_poll() on x86_64 via tha ia32 layer

Eric Dumazet <eric.dumazet@...il.com> writes:
>  
>  SYSCALL_DEFINE3(poll, struct pollfd __user *, ufds, unsigned int, nfds,
> -		long, timeout_msecs)
> +		int, timeout_msecs)

The preferred fix is normally to write a compat wrapper that sign
extends.

Maybe someone on 64bit really wants to wait for a long time, but 
not forever.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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