ARM: v6k: select cmpxchg code sequences according to V6 variants
commit4ed67a53591db641543d57f31c182591a429dc93
authorRussell King <rmk+kernel@arm.linux.org.uk>
Mon, 17 Jan 2011 15:42:42 +0000 (17 15:42 +0000)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Wed, 2 Feb 2011 21:23:28 +0000 (2 21:23 +0000)
tree1e35ab3a934d96bb149d2bd9f10f70ca521cc361
parent7db44c75a241c18d03e82540c5b825216d4c668b
ARM: v6k: select cmpxchg code sequences according to V6 variants

If CONFIG_CPU_V6 is enabled, we must avoid the byte/halfword/doubleword
exclusive operations, which aren't implemented before V6K.  Use the
generic versions (or omit them) instead.

If CONFIG_CPU_V6 is not set, but CONFIG_CPU_32v6K is enabled, we have
the K extnesions, so use these new instructions.

Acked-by: Tony Lindgren <tony@atomide.com>
Tested-by: Sourav Poddar <sourav.poddar@ti.com>
Tested-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/include/asm/system.h