This series is aimed to optimise the arm64 cpus_have_cap() functionality (checking for the presence of certain CPU capabilities/features) to avoid a bitmap test and use a jump label instead, patched at boot time.
While this series may not provide a clear performance improvement with the current kernel, it will be more beneficial with new features like TTBR0 PAN are which are used on hot paths (get_user/put_user, thread switching). Catalin Marinas (2): jump_labels: Allow array initialisers arm64: Use static keys for CPU features Documentation/static-keys.txt | 8 ++++++++ arch/arm64/include/asm/cpufeature.h | 14 +++++++++++--- arch/arm64/kernel/cpufeature.c | 3 +++ arch/arm64/kernel/cpuinfo.c | 6 ++++++ include/linux/jump_label.h | 12 ++++++++++++ 5 files changed, 40 insertions(+), 3 deletions(-)
