From: Chase Venters <chase.venters@clientec.com>
Date: Sat, 8 Jul 2006 16:10:29 +0000 (-0500)
Subject: [PATCH] Make cpu_relax() imply barrier() on all arches
X-Git-Tag: v2.6.18-rc2~104
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f6dc8c5b8e04ce28720155383e971561a23899d5;p=pandora-kernel.git

[PATCH] Make cpu_relax() imply barrier() on all arches

During the recent discussion of taking 'volatile' off of the spinlock, I
noticed that while most arches #define cpu_relax() such that it implies
barrier(), some arches define cpu_relax() to be empty.

This patch changes the definition of cpu_relax() for frv, h8300, m68knommu,
sh, sh64, v850 and xtensa from an empty while(0) to the compiler barrier().

Signed-off-by: Chase Venters <chase.venters@clientec.com>
Acked-by: Arjan van de Ven <arjan@Linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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