Single-step slot would not be used until kprobe is enabled, that means no race condition occurs on it under SMP, hence it is safe to pacth ss slot without stopping machine. v4: 1. Add Acked-by from Will Deacon 2. Mark Rutland provides some subtleties on arm64 micro-architecture that needs to follow. v3: 1. Drop duplicated I-Cache maintenance for arm64. 2. Add Acked-by from Masami Hiramatsu. v2: Backport riscv patch to cksy and arm64. Liao Chang (3): riscv/kprobe: Optimize the performance of patching single-step slot csky/kprobe: Optimize the performance of patching single-step slot arm64/kprobe: Optimize the performance of patching single-step slot arch/arm64/kernel/probes/kprobes.c | 27 +++++++++++++++++++++------ arch/csky/kernel/probes/kprobes.c | 6 +++++- arch/riscv/kernel/probes/kprobes.c | 8 +++++--- 3 files changed, 31 insertions(+), 10 deletions(-) -- 2.17.1
