netdev - Re: [PATCH net-next 05/22] cxgb4: Add T5 write combining support

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Date:	Tue, 12 Mar 2013 08:19:27 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	vipul@...lsio.com
Cc:	netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
	linux-scsi@...r.kernel.org, roland@...estorage.com,
	JBottomley@...allels.com, dm@...lsio.com,
	swise@...ngridcomputing.com, leedom@...lsio.com,
	naresh@...lsio.com, divy@...lsio.com, santosh@...lsio.com,
	arvindb@...lsio.com, abhishek@...lsio.com
Subject: Re: [PATCH net-next 05/22] cxgb4: Add T5 write combining support

From: Vipul Pandya <vipul@...lsio.com>
Date: Tue, 12 Mar 2013 17:16:17 +0530

> +				writel(n,  adap->bar2 + q->udb + 8);
> +#if defined(CONFIG_X86_32) || defined(CONFIG_X86_64)
> +			asm volatile("sfence" : : : "memory");
> +#endif

There is absolutely no way I'm letting anyone put crap like this
into a driver.

Use a portable inteface, and if one does not exist create one.
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