tree cbe903bef21fce0d5923cc83071b7b66d00d94c4
parent 224b5be6ddc12fa7587433878866cd39e7b935f5
author Nicolas Pitre <nico@cam.org> 1132153511 +0000
committer Russell King <rmk+kernel@arm.linux.org.uk> 1132153511 +0000

[ARM] 3165/1: fix atomic_cmpxchg() implementation for ARMv6+

Patch from Nicolas Pitre

If 'old' and 'oldval' are different then 'res' never gets set.  In that
case, if ever %0 happened to contain anything but zero (rather likely)
then the code will loop forever (or until another CPU just come along
and change the atomic value to match 'old' which is rather unlikely).

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>