netdev - RE: [PATCH 0/4] Add lightweight memory barriers fast_rmb() and fast

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Message-ID: <063D6719AE5E284EB5DD2968C1650D6D1C9F2930@AcuExch.aculab.com>
Date:	Tue, 18 Nov 2014 09:57:14 +0000
From:	David Laight <David.Laight@...LAB.COM>
To:	'Alexander Duyck' <alexander.h.duyck@...hat.com>,
	"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
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Subject: RE: [PATCH 0/4] Add lightweight memory barriers fast_rmb() and
 fast_wmb()

From: Alexander Duyck
> These patches introduce two new primitives for synchronizing cache-enabled
> memory writes and reads.  These two new primitives are:
> 
> 	fast_rmb()
> 	fast_wmb()

Not sure I like the names.
If the aim is to sync data into the local cache so that hardware
that is doing cache-snooping accesses sees the data then maybe
	local_rmb() and local_wmb()

IIRC read_barrier_depends() is a nop on everything except alpha.
Maybe add the default if it isn't defined by the MD file?

	David