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authorWill Deacon <will.deacon@arm.com>2013-10-09 17:19:22 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-10-29 11:06:11 +0000
commit0cbad9c9dfe0c38e8ec7385b39087c005a6dee3e (patch)
treec835625cbf2eb478134713fe1df99ca5e4e9bbf3 /arch/arm/lib
parent775ebcc16b940ebf61bf54d6054a5e639f68b9d6 (diff)
downloadlinux-linaro-stable-0cbad9c9dfe0c38e8ec7385b39087c005a6dee3e.tar.gz
ARM: 7854/1: lockref: add support for lockless lockrefs using cmpxchg64
Our spinlocks are only 32-bit (2x16-bit tickets) and, on processors with 64-bit atomic instructions, cmpxchg64 makes use of the double-word exclusive accessors. This patch wires up the cmpxchg-based lockless lockref implementation for ARM. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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