linux/arch/arm/include
Will Deacon c32ffce0f6 ARM: 7984/1: prefetch: add prefetchw invocations for barriered atomics
After a bunch of benchmarking on the interaction between dmb and pldw,
it turns out that issuing the pldw *after* the dmb instruction can
give modest performance gains (~3% atomic_add_return improvement on a
dual A15).

This patch adds prefetchw invocations to our barriered atomic operations
including cmpxchg, test_and_xxx and futexes.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-02-25 11:30:20 +00:00
..
asm ARM: 7984/1: prefetch: add prefetchw invocations for barriered atomics 2014-02-25 11:30:20 +00:00
debug i.MX SoC changes for 3.14: 2014-01-02 12:10:12 -08:00
uapi/asm First round of KVM updates for 3.14; PPC parts will come next week. 2014-01-22 21:40:43 -08:00