[PATCH 3/4] samples/kretprobe: convert the printk to pr_info/pr_err

From: Huang Shijie
Date: Tue May 24 2016 - 22:26:03 EST


We prefer to use the pr_* to print out the log now, this patch converts
the printk to pr_info. In the error path, use the pr_err to replace the
printk.

Signed-off-by: Huang Shijie <shijie.huang@xxxxxxx>
---
samples/kprobes/kretprobe_example.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/samples/kprobes/kretprobe_example.c b/samples/kprobes/kretprobe_example.c
index ebb1d1a..adc83e9 100644
--- a/samples/kprobes/kretprobe_example.c
+++ b/samples/kprobes/kretprobe_example.c
@@ -62,7 +62,7 @@ static int ret_handler(struct kretprobe_instance *ri, struct pt_regs *regs)

now = ktime_get();
delta = ktime_to_ns(ktime_sub(now, data->entry_stamp));
- printk(KERN_INFO "%s returned %d and took %lld ns to execute\n",
+ pr_info("%s returned %d and took %lld ns to execute\n",
func_name, retval, (long long)delta);
return 0;
}
@@ -82,11 +82,10 @@ static int __init kretprobe_init(void)
my_kretprobe.kp.symbol_name = func_name;
ret = register_kretprobe(&my_kretprobe);
if (ret < 0) {
- printk(KERN_INFO "register_kretprobe failed, returned %d\n",
- ret);
+ pr_err("register_kretprobe failed, returned %d\n", ret);
return -1;
}
- printk(KERN_INFO "Planted return probe at %s: %p\n",
+ pr_info("Planted return probe at %s: %p\n",
my_kretprobe.kp.symbol_name, my_kretprobe.kp.addr);
return 0;
}
@@ -94,11 +93,10 @@ static int __init kretprobe_init(void)
static void __exit kretprobe_exit(void)
{
unregister_kretprobe(&my_kretprobe);
- printk(KERN_INFO "kretprobe at %p unregistered\n",
- my_kretprobe.kp.addr);
+ pr_info("kretprobe at %p unregistered\n", my_kretprobe.kp.addr);

/* nmissed > 0 suggests that maxactive was set too low. */
- printk(KERN_INFO "Missed probing %d instances of %s\n",
+ pr_info("Missed probing %d instances of %s\n",
my_kretprobe.nmissed, my_kretprobe.kp.symbol_name);
}

--
2.5.5