| commit | 0cbad9c9dfe0c38e8ec7385b39087c005a6dee3e | [log] [tgz] |
|---|---|---|
| author | Will Deacon <will.deacon@arm.com> | Wed Oct 09 17:19:22 2013 +0100 |
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | Tue Oct 29 11:06:11 2013 +0000 |
| tree | c835625cbf2eb478134713fe1df99ca5e4e9bbf3 | |
| parent | 775ebcc16b940ebf61bf54d6054a5e639f68b9d6 [diff] |
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>