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samples: Use KSYM_NAME_LEN for kprobes 

It is better and enough to use KSYM_NAME_LEN for kprobes
in samples, no need to define and use the other values.

Link: https://lkml.kernel.org/r/1654651402-21552-1-git-send-email-yangtiezhu@loongson.cn

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Tiezhu Yang 2022-06-08 09:23:22 +08:00 committed by Steven Rostedt (Google)
parent e3655dfa58
commit 1e1fb420fe
2 changed files with 4 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
samples/kprobes/kprobe_example.c
View File

@ -16,9 +16,8 @@
#include <linux/module.h>
#include <linux/kprobes.h>
#define MAX_SYMBOL_LEN 64
static char symbol[MAX_SYMBOL_LEN] = "kernel_clone";
module_param_string(symbol, symbol, sizeof(symbol), 0644);
static char symbol[KSYM_NAME_LEN] = "kernel_clone";
module_param_string(symbol, symbol, KSYM_NAME_LEN, 0644);
/* For each probe you need to allocate a kprobe structure */
static struct kprobe kp = {

5
samples/kprobes/kretprobe_example.c
View File

@ -23,11 +23,10 @@
#include <linux/module.h>
#include <linux/kprobes.h>
#include <linux/ktime.h>
#include <linux/limits.h>
#include <linux/sched.h>
static char func_name[NAME_MAX] = "kernel_clone";
module_param_string(func, func_name, NAME_MAX, S_IRUGO);
static char func_name[KSYM_NAME_LEN] = "kernel_clone";
module_param_string(func, func_name, KSYM_NAME_LEN, 0644);
MODULE_PARM_DESC(func, "Function to kretprobe; this module will report the"
" function's execution time");