Messages in this thread Patch in this message | | | From | Wang Nan <> | Subject | [RFC PATCH v4 34/34] early kprobes: enable optimization of kprobes on ftrace before ftrace is ready. | Date | Mon, 2 Mar 2015 22:25:12 +0800 |
| |
Uses ftrace_process_loc_early() introduced by previous patch to convert ftrace entries to nops before ftrace_init(). For x86, original kprobe entries are 'call' and are optimizable only after this conversion.
Signed-off-by: Wang Nan <wangnan0@huawei.com> --- kernel/kprobes.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/kernel/kprobes.c b/kernel/kprobes.c index 56fb8c8..1ec8e6e 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -1602,6 +1602,9 @@ int register_kprobe(struct kprobe *p) goto out; } + if (p->flags & KPROBE_FLAG_FTRACE_EARLY) + ftrace_process_loc_early((unsigned long)p->addr); + mutex_lock(&text_mutex); /* Avoiding text modification */ ret = prepare_kprobe(p); mutex_unlock(&text_mutex); -- 1.8.4
| |