Hi, Here is the 5th version of the series to unify the kretprobe trampoline handler and to make the kretprobe lockless. Thanks Peter for this work !! Previous version is here; https://lkml.kernel.org/r/159861759775.992023.12553306821235086809.stgit@devnote2 This version merges the remove-task-scan patch into remove kretprobe hash patch, fixes code according to the comments, and fixes a minor issues. This version is also available on git://git.kernel.org/pub/scm/linux/kernel/git/mhiramat/linux.git lockless-kretprobe-v5 I ran smoke test and ftracetest on x86-64 and did build tests for x86-64, i386, arm, arm64, and mips. Thank you, --- Masami Hiramatsu (16): kprobes: Add generic kretprobe trampoline handler x86/kprobes: Use generic kretprobe trampoline handler arm: kprobes: Use generic kretprobe trampoline handler arm64: kprobes: Use generic kretprobe trampoline handler arc: kprobes: Use generic kretprobe trampoline handler csky: kprobes: Use generic kretprobe trampoline handler ia64: kprobes: Use generic kretprobe trampoline handler mips: kprobes: Use generic kretprobe trampoline handler parisc: kprobes: Use generic kretprobe trampoline handler powerpc: kprobes: Use generic kretprobe trampoline handler s390: kprobes: Use generic kretprobe trampoline handler sh: kprobes: Use generic kretprobe trampoline handler sparc: kprobes: Use generic kretprobe trampoline handler kprobes: Remove NMI context check kprobes: Free kretprobe_instance with rcu callback kprobes: Make local used functions static Peter Zijlstra (5): llist: Add nonatomic __llist_add() and __llist_dell_all() kprobes: Remove kretprobe hash asm-generic/atomic: Add try_cmpxchg() fallbacks freelist: Lock less freelist kprobes: Replace rp->free_instance with freelist arch/arc/kernel/kprobes.c | 54 ------ arch/arm/probes/kprobes/core.c | 78 --------- arch/arm64/kernel/probes/kprobes.c | 78 --------- arch/csky/kernel/probes/kprobes.c | 77 -------- arch/ia64/kernel/kprobes.c | 77 -------- arch/mips/kernel/kprobes.c | 54 ------ arch/parisc/kernel/kprobes.c | 76 -------- arch/powerpc/kernel/kprobes.c | 53 ------ arch/s390/kernel/kprobes.c | 79 --------- arch/sh/kernel/kprobes.c | 58 ------ arch/sparc/kernel/kprobes.c | 51 ------ arch/x86/include/asm/atomic.h | 2 arch/x86/include/asm/atomic64_64.h | 2 arch/x86/include/asm/cmpxchg.h | 2 arch/x86/kernel/kprobes/core.c | 108 ------------ drivers/gpu/drm/i915/i915_request.c | 6 - include/asm-generic/atomic-instrumented.h | 216 ++++++++++++++---------- include/linux/atomic-arch-fallback.h | 90 +++++++++- include/linux/atomic-fallback.h | 90 +++++++++- include/linux/freelist.h | 129 ++++++++++++++ include/linux/kprobes.h | 74 +++++--- include/linux/llist.h | 23 +++ include/linux/sched.h | 4 kernel/fork.c | 4 kernel/kprobes.c | 264 +++++++++++++---------------- kernel/trace/trace_kprobe.c | 3 scripts/atomic/gen-atomic-fallback.sh | 63 ++++++- scripts/atomic/gen-atomic-instrumented.sh | 29 +++ 28 files changed, 735 insertions(+), 1109 deletions(-) create mode 100644 include/linux/freelist.h -- Masami Hiramatsu (Linaro) <mhiramat@xxxxxxxxxx>
