kprobes: Remove unneeded warnings from __arm_kprobe_ftrace()

Remove unneeded warnings for handled errors from __arm_kprobe_ftrace()
because all caller handled the error correctly.

Link: https://lore.kernel.org/all/177261531182.1312989.8737778408503961141.stgit@mhiramat.tok.corp.google.com/
Reported-by: Zw Tang <shicenci@gmail.com>
Closes: https://lore.kernel.org/all/CAPHJ_V+J6YDb_wX2nhXU6kh466Dt_nyDSas-1i_Y8s7tqY-Mzw@mail.gmail.com/
Fixes: 9c89bb8e3272 ("kprobes: treewide: Cleanup the error messages for kprobes")
Cc: stable@vger.kernel.org
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 025af57..bfc8908 100644 (file)
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1144,12 +1144,12 @@ static int __arm_kprobe_ftrace(struct kprobe *p, struct ftrace_ops *ops,
        lockdep_assert_held(&kprobe_mutex);
 
        ret = ftrace_set_filter_ip(ops, (unsigned long)p->addr, 0, 0);
-       if (WARN_ONCE(ret < 0, "Failed to arm kprobe-ftrace at %pS (error %d)\n", p->addr, ret))
+       if (ret < 0)
                return ret;
 
        if (*cnt == 0) {
                ret = register_ftrace_function(ops);
-               if (WARN(ret < 0, "Failed to register kprobe-ftrace (error %d)\n", ret)) {
+               if (ret < 0) {
                        /*
                         * At this point, sinec ops is not registered, we should be sefe from
                         * registering empty filter.