linux-kernel - Re: [PATCH -next] nfs: fix ISO C90 warning

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Message-Id: <1261003219.13878.6.camel@localhost>
Date:	Wed, 16 Dec 2009 17:40:19 -0500
From:	Trond Myklebust <trond.myklebust@....uio.no>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	linux-nfs@...r.kernel.org
Subject: Re: [PATCH -next] nfs: fix ISO C90 warning

On Wed, 2009-12-16 at 14:23 -0800, Randy Dunlap wrote: 
> From: Randy Dunlap <randy.dunlap@...cle.com>
> 
> Fix gcc ISO C90 warning:
> 
> fs/nfs/callback.c:356: warning: ISO C90 forbids mixed declarations and code
> 
> Signed-off-by: Randy Dunlap <randy.dunlap@...cle.com>
> ---
>  fs/nfs/callback.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> --- linux-next-20091215.orig/fs/nfs/callback.c
> +++ linux-next-20091215/fs/nfs/callback.c
> @@ -352,8 +352,8 @@ static int check_gss_callback_principal(
>  static int nfs_callback_authenticate(struct svc_rqst *rqstp)
>  {
>  	struct nfs_client *clp;
> -	RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
>  	int ret = SVC_OK;
> +	RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
>  

What version of gcc is giving rise to this warning?

RPC_IFDEBUG is a macro that either evaluates to its argument, or to
nothing, depending on whether or not RPC_DEBUG is defined or not. In
neither case should it evaluate to anything illegal under C90 rules
afaics.

Trond

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