linux-kernel - Re: [PATCH] net: rds: fix per-cpu helper usage

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Message-Id: <20140117.175259.1030142896492431310.davem@davemloft.net>
Date:	Fri, 17 Jan 2014 17:52:59 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	gerald.schaefer@...ibm.com
Cc:	davidshan@...cent.com, cl@...ux.com,
	venkat.x.venkatsubra@...cle.com, rds-devel@....oracle.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	schwidefsky@...ibm.com, frank.blaschka@...ibm.com,
	sebott@...ux.vnet.ibm.com
Subject: Re: [PATCH] net: rds: fix per-cpu helper usage

From: Gerald Schaefer <gerald.schaefer@...ibm.com>
Date: Thu, 16 Jan 2014 16:54:48 +0100

> commit ae4b46e9d "net: rds: use this_cpu_* per-cpu helper" broke per-cpu
> handling for rds. chpfirst is the result of __this_cpu_read(), so it is
> an absolute pointer and not __percpu. Therefore, __this_cpu_write()
> should not operate on chpfirst, but rather on cache->percpu->first, just
> like __this_cpu_read() did before.
> 
> Cc: <stable@...r.kernel.org> # 3.8+
> Signed-off-byd Gerald Schaefer <gerald.schaefer@...ibm.com>

Applied and queued up for -stable, thanks.
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