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module: fix the module name length in param_sysfs_builtin

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the original code use KOBJ_NAME_LEN for built-in module name length,
that's defined to 20 in linux/kobject.h, but this is not enough appearntly,
many module names are longer than this;
 #define KOBJ_NAME_LEN                   20

another macro is MODULE_NAME_LEN defined in linux/module.h, I think this is
enough for module names:
 #define MODULE_NAME_LEN (64 - sizeof(unsigned long))

Signed-off-by: Denis Cheng <crquan@gmail.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Denis Cheng 2008-01-21 17:08:25 +08:00 committed by Rusty Russell
parent 6dd06c9fbe
commit 8686c99875
1 changed files with 3 additions and 5 deletions
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8
kernel/params.c
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@ -376,8 +376,6 @@ int param_get_string(char *buffer, struct kernel_param *kp)
extern struct kernel_param __start___param[], __stop___param[];
#define MAX_KBUILD_MODNAME KOBJ_NAME_LEN
struct param_attribute
{
struct module_attribute mattr;
@ -587,7 +585,7 @@ static void __init param_sysfs_builtin(void)
{
struct kernel_param *kp, *kp_begin = NULL;
unsigned int i, name_len, count = 0;
char modname[MAX_KBUILD_MODNAME + 1] = "";
char modname[MODULE_NAME_LEN + 1] = "";
for (i=0; i < __stop___param - __start___param; i++) {
char *dot;
@ -595,12 +593,12 @@ static void __init param_sysfs_builtin(void)
kp = &__start___param[i];
max_name_len =
min_t(size_t, MAX_KBUILD_MODNAME, strlen(kp->name));
min_t(size_t, MODULE_NAME_LEN, strlen(kp->name));
dot = memchr(kp->name, '.', max_name_len);
if (!dot) {
DEBUGP("couldn't find period in first %d characters "
"of %s\n", MAX_KBUILD_MODNAME, kp->name);
"of %s\n", MODULE_NAME_LEN, kp->name);
continue;
}
name_len = dot - kp->name;