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(parent: c09d6a0) | patch
arm64: locks: patch in lse instructions when supported by the CPU
authorWill Deacon <will.deacon@arm.com>
Tue, 10 Feb 2015 03:03:15 +0000 (03:03 +0000)
committerWill Deacon <will.deacon@arm.com>
Mon, 27 Jul 2015 14:28:51 +0000 (15:28 +0100)
commit81bb5c6420635dfd058c210bd342c29c95ccd145
treeefd296b41a78c1199f9f76f3a9dd02b240023502tree | snapshot
parentc09d6a04d17d730b0463207a26ece082772b59eecommit | diff
arm64: locks: 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 our locking functions so that
LSE atomic instructions are used for spinlocks and rwlocks.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/arm64/include/asm/spinlock.h diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git