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

Tiezhu Yang committed 4 years ago

Commit 1e1fb421 parent e3655df2 files · +4 −6Browse files

Unified · Split

2 files

samples/kprobes/kprobe_example.c +2 −3
samples/kprobes/kretprobe_example.c +2 −3

samples/kprobes/kprobe_example.c+2−3

@@ -16,9 +16,8 @@ · 15 unmodified lines
16	16	#include <linux/module.h>
17	17	#include <linux/kprobes.h>
18	18
19		−#define MAX_SYMBOL_LEN 64
20		−static char symbol[MAX_SYMBOL_LEN] = "kernel_clone";
21		−module_param_string(symbol, symbol, sizeof(symbol), 0644);
	19	+static char symbol[KSYM_NAME_LEN] = "kernel_clone";
	20	+module_param_string(symbol, symbol, KSYM_NAME_LEN, 0644);
22	21
23	22	/* For each probe you need to allocate a kprobe structure */
24	23	static struct kprobe kp = {

samples/kprobes/kretprobe_example.c+2−3

@@ -23,11 +23,10 @@ · 22 unmodified lines
23	23	#include <linux/module.h>
24	24	#include <linux/kprobes.h>
25	25	#include <linux/ktime.h>
26		−#include <linux/limits.h>
27	26	#include <linux/sched.h>
28	27
29		−static char func_name[NAME_MAX] = "kernel_clone";
30		−module_param_string(func, func_name, NAME_MAX, S_IRUGO);
	28	+static char func_name[KSYM_NAME_LEN] = "kernel_clone";
	29	+module_param_string(func, func_name, KSYM_NAME_LEN, 0644);
31	30	MODULE_PARM_DESC(func, "Function to kretprobe; this module will report the"
32	31	" function's execution time");
33	32