summaryrefslogtreecommitdiffstats
path: root/arch/arm64/include/asm/atomic_ll_sc.h
diff options
context:
space:
mode:
authorWill Deacon <will.deacon@arm.com>2015-03-31 14:11:24 +0100
committerWill Deacon <will.deacon@arm.com>2015-07-27 15:28:51 +0100
commitc8366ba0fb65063b6b4f69c7af1ea74152435590 (patch)
tree5e1b7a728baa9428185c8339d33344cf35037b8d /arch/arm64/include/asm/atomic_ll_sc.h
parent084f903727e1c3a61d6bcdaeeed30bddc6d7f65a (diff)
downloadlinux-c8366ba0fb65063b6b4f69c7af1ea74152435590.tar.bz2
arm64: xchg: 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 xchg primitives so that the LSE swp instruction (yes, you read right!) is used instead. Reviewed-by: Steve Capper <steve.capper@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/atomic_ll_sc.h')
0 files changed, 0 insertions, 0 deletions