linux-kernel - Re: [PATCH v2 4/5] kmemleak: fix sparse warning over overshadowed flags

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1251996915.22485.26.camel@pc1117.cambridge.arm.com>
Date:	Thu, 03 Sep 2009 17:55:15 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	"Luis R. Rodriguez" <lrodriguez@...eros.com>
Cc:	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
	penberg@...helsinki.fi, mcgrof@...il.com
Subject: Re: [PATCH v2 4/5] kmemleak: fix sparse warning over overshadowed
	flags

On Thu, 2009-09-03 at 01:35 -0400, Luis R. Rodriguez wrote:
> This fixes this sparse warning:
> mm/kmemleak.c:512:31: warning: symbol 'flags' shadows an earlier one
> mm/kmemleak.c:448:23: originally declared here
> 
> Signed-off-by: Luis R. Rodriguez <lrodriguez@...eros.com>
> ---
>  mm/kmemleak.c |    6 +++---
>  1 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/mm/kmemleak.c b/mm/kmemleak.c
> index 58c07b1..24e7a84 100644
> --- a/mm/kmemleak.c
> +++ b/mm/kmemleak.c
> @@ -509,14 +509,14 @@ static void create_object(unsigned long ptr, size_t size, int min_count,
>  	 * random memory blocks.
>  	 */
>  	if (node != &object->tree_node) {
> -		unsigned long flags;
> +		unsigned long flags_object;
>  
>  		kmemleak_stop("Cannot insert 0x%lx into the object search tree "
>  			      "(already existing)\n", ptr);
>  		object = lookup_object(ptr, 1);
> -		spin_lock_irqsave(&object->lock, flags);
> +		spin_lock_irqsave(&object->lock, flags_object);
>  		dump_object_info(object);
> -		spin_unlock_irqrestore(&object->lock, flags);
> +		spin_unlock_irqrestore(&object->lock, flags_object);

As Pekka said, we only need spin_lock() variant here as the interrupts
are already disabled.

-- 
Catalin

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/