From: Peter Zijlstra <peterz@infradead.org>
Date: Thu, 26 Mar 2015 16:45:37 +0000 (+0100)
Subject: locking: Remove atomicy checks from {READ,WRITE}_ONCE
X-Git-Tag: omap-for-v4.1/fixes-rc1~199^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7bd3e239d6c6d1cad276e8f130b386df4234dcd7;p=pandora-kernel.git

locking: Remove atomicy checks from {READ,WRITE}_ONCE

The fact that volatile allows for atomic load/stores is a special case
not a requirement for {READ,WRITE}_ONCE(). Their primary purpose is to
force the compiler to emit load/stores _once_.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

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