Steve Capper f97fc81079 arm64: percpu: Implement this_cpu operations ... The generic this_cpu operations disable interrupts to ensure that the requested operation is protected from pre-emption. For arm64, this is overkill and can hurt throughput and latency. This patch provides arm64 specific implementations for the this_cpu operations. Rather than disable interrupts, we use the exclusive monitor or atomic operations as appropriate. The following operations are implemented: add, add_return, and, or, read, write, xchg. We also wire up a cmpxchg implementation from cmpxchg.h. Testing was performed using the percpu_test module and hackbench on a Juno board running 3.18-rc4. Signed-off-by: Steve Capper <steve.capper@linaro.org> Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>		2014-11-20 12:05:18 +00:00
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asm	arm64: percpu: Implement this_cpu operations	2014-11-20 12:05:18 +00:00
uapi/asm	arm/arm64: KVM: vgic: make number of irqs a configurable attribute	2014-09-18 18:48:58 -07:00