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

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From: Vipul Pandya <vipul@xxxxxxxxxxx>
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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