linux-kernel - Re: [PATCH 18/18] flag parameters: check magic constants

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Message-Id: <20080512201341.9ead6a9a.akpm@linux-foundation.org>
Date:	Mon, 12 May 2008 20:13:41 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Ulrich Drepper <drepper@...hat.com>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	davidel@...ilserver.org, mtk.manpages@...il.com,
	torvalds@...ux-foundation.org
Subject: Re: [PATCH 18/18] flag parameters: check magic constants

On Tue, 6 May 2008 17:18:07 -0400 Ulrich Drepper <drepper@...hat.com> wrote:

> --- a/net/socket.c
> +++ b/net/socket.c
> @@ -1219,6 +1219,13 @@ asmlinkage long sys_socket(int family, int type, int protocol)
>  	struct socket *sock;
>  	int flags;
>  
> +	/* Check the SOCK_* constants for consistency.  */
> +	BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC);
> +	BUILD_BUG_ON(SOCK_NONBLOCK != O_NONBLOCK);
> +	BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK);
> +	BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK);
> +	BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK);

The fifth assertion triggers with alpha allmodconfig.
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