linux-kernel - Re: [PATCH 07/10] local

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Date:	Thu, 15 Feb 2007 08:50:20 -0600
From:	Kumar Gala <galak@...nel.crashing.org>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 07/10] local_t : powerpc extension


On Feb 15, 2007, at 1:20 AM, Mathieu Desnoyers wrote:

> * Andrew Morton (akpm@...ux-foundation.org) wrote:
>> On Sun, 11 Feb 2007 14:18:12 -0500 Mathieu Desnoyers  
>> <mathieu.desnoyers@...ymtl.ca> wrote:
>>
>>> local_t : powerpc extension
>>
>> This diff contains changes which are also present in "[PATCH 07/10]
>> atomic.h : Add atomic64 cmpxchg, xchg and add_unless to powerpc",  
>> resulting
>> in rather a mess.
>>
>> I dropped the duplicated hunks from the later patch rather than  
>> this one,
>> but I haven't tried to compile the result yet.
>>
>
> Yes, sorry about that : the atomic.h diff has been duplicated in both
> the local and atomic changes.
>
> The change to system.h for local.h is to add the xchg_local and
> cmpxchg_local, while the change for atomic.h is to simply remove the
> #include <asm/atomic.h> from system.h.
>
> Here is a proper local.h diff, if it happens to become necessary, but
> simply removing the duplicated asm-powerpc/system.h hunks will be ok.
>
> Thanks,
>
> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
>
> --- a/include/asm-powerpc/local.h
> +++ b/include/asm-powerpc/local.h
> @@ -1 +1,342 @@
> -#include <asm-generic/local.h>
> +#ifndef _ARCH_POWERPC_LOCAL_H
> +#define _ARCH_POWERPC_LOCAL_H
> +
> +#include <linux/percpu.h>
> +#include <asm/atomic.h>
> +
> +typedef struct
> +{
> +	atomic_long_t a;
> +} local_t;
> +
> +#define LOCAL_INIT(i)	{ ATOMIC_LONG_INIT(i) }
> +
> +#define local_read(l)	atomic_long_read(&(l)->a)
> +#define local_set(l,i)	atomic_long_set(&(l)->a, (i))
> +
> +#define local_add(i,l)	atomic_long_add((i),(&(l)->a))
> +#define local_sub(i,l)	atomic_long_sub((i),(&(l)->a))
> +#define local_inc(l)	atomic_long_inc(&(l)->a)
> +#define local_dec(l)	atomic_long_dec(&(l)->a)
> +
> +#ifndef __powerpc64__
> +
> +static __inline__ int local_add_return(int a, local_t *l)
> +{

is there a reason this isn't local_add_return(long a, local_t *l) on  
ppc32?

(same comment for other functions)

- k



-
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