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samples/kretprobe: convert the printk to pr_info/pr_err

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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.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Huang Shijie <[email protected]>
Cc: Petr Mladek <[email protected]>
Cc: Steve Capper <[email protected]>
Cc: Ananth N Mavinakayanahalli <[email protected]>
Cc: Anil S Keshavamurthy <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Huang Shijie 2016-08-03 13:46:09 -07:00 • committed by Linus Torvalds
commit 613413143f
1 changed files with 5 additions and 7 deletions
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12
samples/kprobes/kretprobe_example.c
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@ -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);
}