diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2020-08-29 16:03:24 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-10-12 19:27:27 +0300 |
| commit | d741bf41d7c7db4898bacfcb020353cddc032fd8 (patch) | |
| tree | 9944b2c314717793ebd6be0982dab4bd4f82b2a1 /kernel/trace/trace_kprobe.c | |
| parent | 476c5818c37a7828d558f34ae01f0c32f8bfadde (diff) | |
| download | linux-d741bf41d7c7db4898bacfcb020353cddc032fd8.tar.xz | |
kprobes: Remove kretprobe hash
The kretprobe hash is mostly superfluous, replace it with a per-task
variable.
This gets rid of the task hash and it's related locking.
Note that this may change the kprobes module-exported API for kretprobe
handlers. If any out-of-tree kretprobe user uses ri->rp, use
get_kretprobe(ri) instead.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/159870620431.1229682.16325792502413731312.stgit@devnote2
Diffstat (limited to 'kernel/trace/trace_kprobe.c')
| -rw-r--r-- | kernel/trace/trace_kprobe.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index aefb6065b508..07baf6f6cecc 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -1714,7 +1714,8 @@ NOKPROBE_SYMBOL(kprobe_dispatcher); static int kretprobe_dispatcher(struct kretprobe_instance *ri, struct pt_regs *regs) { - struct trace_kprobe *tk = container_of(ri->rp, struct trace_kprobe, rp); + struct kretprobe *rp = get_kretprobe(ri); + struct trace_kprobe *tk = container_of(rp, struct trace_kprobe, rp); raw_cpu_inc(*tk->nhit); |