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| H A D | cmpxchg.h | diff e8973a889e69cb86cac08bec2863c878c0d27af9 Fri Oct 09 06:10:02 CDT 2015 Sarbojit Ganguly <ganguly.s@samsung.com> ARM: 8443/1: Adding support for atomic half word exchange
Since support for half-word atomic exchange was not there and Qspinlock
on ARM requires it, modified __xchg() to add support for that as well.
ARMv6 and lower does not support ldrex{b,h} so, added a guard code to
prevent build breaks.
Signed-off-by: Sarbojit Ganguly <ganguly.s@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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