tree df590e4e096ac332a7d95ef96275bebd57ce70c9
parent 0f74964627e0ece4ac8da0e2cd01906ec322b4fe
author Chase Venters <chase.venters@clientec.com> 1152375029 -0500
committer Linus Torvalds <torvalds@g5.osdl.org> 1152734205 -0700

[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>