linux-kernel - Re: [PATCH] asm-generic: fix local_add

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Message-ID: <20090512214714.GA27519@Krystal>
Date:	Tue, 12 May 2009 17:47:14 -0400
From:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
To:	Roel Kluin <roel.kluin@...il.com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] asm-generic: fix local_add_unless macro

* Roel Kluin (roel.kluin@...il.com) wrote:
> ------------------------------>8-------------8<---------------------------------
> `local_add_unless(x, y, z)' will be expanded to `(&(x)->y, (y), (x))', but 
> `&(x)->y' should be `&(x)->a'
> 
> Signed-off-by: Roel Kluin <roel.kluin@...il.com>

It looks good to me.

Acked-by: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>

> ---
> Was this patch lost? it's still not in current git.
> 
> diff --git a/include/asm-generic/local.h b/include/asm-generic/local.h
> index dbd6150..fc21844 100644
> --- a/include/asm-generic/local.h
> +++ b/include/asm-generic/local.h
> @@ -42,7 +42,7 @@ typedef struct
>  
>  #define local_cmpxchg(l, o, n) atomic_long_cmpxchg((&(l)->a), (o), (n))
>  #define local_xchg(l, n) atomic_long_xchg((&(l)->a), (n))
> -#define local_add_unless(l, a, u) atomic_long_add_unless((&(l)->a), (a), (u))
> +#define local_add_unless(l, _a, u) atomic_long_add_unless((&(l)->a), (_a), (u))
>  #define local_inc_not_zero(l) atomic_long_inc_not_zero(&(l)->a)
>  
>  /* Non-atomic variants, ie. preemption disabled and won't be touched

-- 
Mathieu Desnoyers
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