linux-kernel - Re: [PATCH] - [7/15] - remove defconfig ptr comparisons to 0

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Message-ID: <18234.24623.742782.328651@notabene.brown>
Date:	Wed, 14 Nov 2007 13:40:47 +1100
From:	Neil Brown <neilb@...e.de>
To:	Joe Perches <joe@...ches.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Trond Myklebust <trond.myklebust@....uio.no>,
	nfs@...ts.sourceforge.net
Subject: Re: [PATCH] - [7/15] - remove defconfig ptr comparisons to 0 - fs/lockd

On Tuesday November 13, joe@...ches.com wrote:
> Remove defconfig ptr comparison to 0
> 
> Remove sparse warning: Using plain integer as NULL pointer
> 
> Signed-off-by: Joe Perches <joe@...ches.com>
> 
> ---
> 
> diff --git a/fs/lockd/svcshare.c b/fs/lockd/svcshare.c
> index 068886d..98548ad 100644
> --- a/fs/lockd/svcshare.c
> +++ b/fs/lockd/svcshare.c
> @@ -71,7 +71,7 @@ nlmsvc_unshare_file(struct nlm_host *host, struct nlm_file *file,
>  	struct nlm_share	*share, **shpp;
>  	struct xdr_netobj	*oh = &argp->lock.oh;
>  
> -	for (shpp = &file->f_shares; (share = *shpp) != 0; shpp = &share->s_next) {
> +	for (shpp = &file->f_shares; (share = *shpp); shpp = &share->s_next) {
>  		if (share->s_host == host && nlm_cmp_owner(share, oh)) {
>  			*shpp = share->s_next;
>  			kfree(share);
> 

I particularly disagree with this change as it now looked like it
could be an '==' comparison that was mistyped.  Making it 
        ....; (share = *shpp) != NULL; ....

makes the intent clear.

NeilBrown
-
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