Will Deacon c09d6a04d1 arm64: atomics: patch in lse instructions when supported by the CPU ... On CPUs which support the LSE atomic instructions introduced in ARMv8.1, it makes sense to use them in preference to ll/sc sequences. This patch introduces runtime patching of atomic_t and atomic64_t routines so that the call-site for the out-of-line ll/sc sequences is patched with an LSE atomic instruction when we detect that the CPU supports it. If binutils is not recent enough to assemble the LSE instructions, then the ll/sc sequences are inlined as though CONFIG_ARM64_LSE_ATOMICS=n. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>		2015-07-27 15:28:50 +01:00
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asm	arm64: atomics: patch in lse instructions when supported by the CPU	2015-07-27 15:28:50 +01:00
uapi/asm	arm64: elf: advertise 8.1 atomic instructions as new hwcap	2015-07-27 14:34:39 +01:00