linux-kernel - Re: [PATCH v3 2/9] net: rds: use this_cpu

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Message-ID: <0000013ae6cadebe-0e44d6a0-5e8c-4ded-a337-d2f41f2ab0e4-000000@email.amazonses.com>
Date:	Fri, 9 Nov 2012 20:09:45 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Shan Wei <shanwei88@...il.com>
cc:	venkat.x.venkatsubra@...cle.com,
	David Miller <davem@...emloft.net>, rds-devel@....oracle.com,
	NetDev <netdev@...r.kernel.org>,
	Kernel-Maillist <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2/9] net: rds: use this_cpu_ptr per-cpu helper

On Fri, 9 Nov 2012, Shan Wei wrote:

>  net/rds/ib_recv.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/net/rds/ib_recv.c b/net/rds/ib_recv.c
> index 8d19491..a4a5064 100644
> --- a/net/rds/ib_recv.c
> +++ b/net/rds/ib_recv.c
> @@ -423,7 +423,7 @@ static void rds_ib_recv_cache_put(struct list_head *new_item,
>
>  	local_irq_save(flags);
>
> -	chp = per_cpu_ptr(cache->percpu, smp_processor_id());
> +	chp = this_cpu_ptr(cache->percpu);
>  	if (!chp->first)

if (!__this_cpu_read(cache-0>percpu->first))

?

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