These structs are never modified, move them to read-only memory.
This makes the API clearer and also prepares for the constification of
'struct attribute' itself.
While at it, also constify 'modinfo_attrs_count'.
Signed-off-by: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
---
include/linux/module.h | 8 ++++----
kernel/module/internal.h | 4 ++--
kernel/module/main.c | 40 ++++++++++++++++++++--------------------
kernel/module/sysfs.c | 4 ++--
kernel/params.c | 12 ++++++------
5 files changed, 34 insertions(+), 34 deletions(-)
diff --git a/include/linux/module.h b/include/linux/module.h
index de2f2293204a4681072fba9ea3439e5582c81fbf..81a0dd46a5d2c29c30ea2cb8d82147ba2fa2a0a8 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -52,9 +52,9 @@ struct module_kobject {
struct module_attribute {
struct attribute attr;
- ssize_t (*show)(struct module_attribute *, struct module_kobject *,
+ ssize_t (*show)(const struct module_attribute *, struct module_kobject *,
char *);
- ssize_t (*store)(struct module_attribute *, struct module_kobject *,
+ ssize_t (*store)(const struct module_attribute *, struct module_kobject *,
const char *, size_t count);
void (*setup)(struct module *, const char *);
int (*test)(struct module *);
@@ -67,10 +67,10 @@ struct module_version_attribute {
const char *version;
};
-extern ssize_t __modver_version_show(struct module_attribute *,
+extern ssize_t __modver_version_show(const struct module_attribute *,
struct module_kobject *, char *);
-extern struct module_attribute module_uevent;
+extern const struct module_attribute module_uevent;
/* These are either module local, or the kernel's dummy ones. */
extern int init_module(void);
diff --git a/kernel/module/internal.h b/kernel/module/internal.h
index daef2be8390222c22220e2f168baa8d35ad531b9..ac73da5f15bccfa6e280669c6ce048868120822b 100644
--- a/kernel/module/internal.h
+++ b/kernel/module/internal.h
@@ -47,8 +47,8 @@ struct kernel_symbol {
extern struct mutex module_mutex;
extern struct list_head modules;
-extern struct module_attribute *modinfo_attrs[];
-extern size_t modinfo_attrs_count;
+extern const struct module_attribute *const modinfo_attrs[];
+extern const size_t modinfo_attrs_count;
/* Provided by the linker */
extern const struct kernel_symbol __start___ksymtab[];
diff --git a/kernel/module/main.c b/kernel/module/main.c
index 5399c182b3cbed2dbeea0291f717f30358d8e7fc..69be1dad032abe53d55b437411f152aa95e4adf6 100644
--- a/kernel/module/main.c
+++ b/kernel/module/main.c
@@ -538,7 +538,7 @@ static void setup_modinfo_##field(struct module *mod, const char *s) \
{ \
mod->field = kstrdup(s, GFP_KERNEL); \
} \
-static ssize_t show_modinfo_##field(struct module_attribute *mattr, \
+static ssize_t show_modinfo_##field(const struct module_attribute *mattr, \
struct module_kobject *mk, char *buffer) \
{ \
return scnprintf(buffer, PAGE_SIZE, "%s\n", mk->mod->field); \
@@ -552,7 +552,7 @@ static void free_modinfo_##field(struct module *mod) \
kfree(mod->field); \
mod->field = NULL; \
} \
-static struct module_attribute modinfo_##field = { \
+static const struct module_attribute modinfo_##field = { \
.attr = { .name = __stringify(field), .mode = 0444 }, \
.show = show_modinfo_##field, \
.setup = setup_modinfo_##field, \
@@ -842,13 +842,13 @@ void symbol_put_addr(void *addr)
}
EXPORT_SYMBOL_GPL(symbol_put_addr);
-static ssize_t show_refcnt(struct module_attribute *mattr,
+static ssize_t show_refcnt(const struct module_attribute *mattr,
struct module_kobject *mk, char *buffer)
{
return sprintf(buffer, "%i\n", module_refcount(mk->mod));
}
-static struct module_attribute modinfo_refcnt =
+static const struct module_attribute modinfo_refcnt =
__ATTR(refcnt, 0444, show_refcnt, NULL);
void __module_get(struct module *module)
@@ -917,7 +917,7 @@ size_t module_flags_taint(unsigned long taints, char *buf)
return l;
}
-static ssize_t show_initstate(struct module_attribute *mattr,
+static ssize_t show_initstate(const struct module_attribute *mattr,
struct module_kobject *mk, char *buffer)
{
const char *state = "unknown";
@@ -938,10 +938,10 @@ static ssize_t show_initstate(struct module_attribute *mattr,
return sprintf(buffer, "%s\n", state);
}
-static struct module_attribute modinfo_initstate =
+static const struct module_attribute modinfo_initstate =
__ATTR(initstate, 0444, show_initstate, NULL);
-static ssize_t store_uevent(struct module_attribute *mattr,
+static ssize_t store_uevent(const struct module_attribute *mattr,
struct module_kobject *mk,
const char *buffer, size_t count)
{
@@ -951,10 +951,10 @@ static ssize_t store_uevent(struct module_attribute *mattr,
return rc ? rc : count;
}
-struct module_attribute module_uevent =
+const struct module_attribute module_uevent =
__ATTR(uevent, 0200, NULL, store_uevent);
-static ssize_t show_coresize(struct module_attribute *mattr,
+static ssize_t show_coresize(const struct module_attribute *mattr,
struct module_kobject *mk, char *buffer)
{
unsigned int size = mk->mod->mem[MOD_TEXT].size;
@@ -966,11 +966,11 @@ static ssize_t show_coresize(struct module_attribute *mattr,
return sprintf(buffer, "%u\n", size);
}
-static struct module_attribute modinfo_coresize =
+static const struct module_attribute modinfo_coresize =
__ATTR(coresize, 0444, show_coresize, NULL);
#ifdef CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC
-static ssize_t show_datasize(struct module_attribute *mattr,
+static ssize_t show_datasize(const struct module_attribute *mattr,
struct module_kobject *mk, char *buffer)
{
unsigned int size = 0;
@@ -980,11 +980,11 @@ static ssize_t show_datasize(struct module_attribute *mattr,
return sprintf(buffer, "%u\n", size);
}
-static struct module_attribute modinfo_datasize =
+static const struct module_attribute modinfo_datasize =
__ATTR(datasize, 0444, show_datasize, NULL);
#endif
-static ssize_t show_initsize(struct module_attribute *mattr,
+static ssize_t show_initsize(const struct module_attribute *mattr,
struct module_kobject *mk, char *buffer)
{
unsigned int size = 0;
@@ -994,10 +994,10 @@ static ssize_t show_initsize(struct module_attribute *mattr,
return sprintf(buffer, "%u\n", size);
}
-static struct module_attribute modinfo_initsize =
+static const struct module_attribute modinfo_initsize =
__ATTR(initsize, 0444, show_initsize, NULL);
-static ssize_t show_taint(struct module_attribute *mattr,
+static ssize_t show_taint(const struct module_attribute *mattr,
struct module_kobject *mk, char *buffer)
{
size_t l;
@@ -1007,10 +1007,10 @@ static ssize_t show_taint(struct module_attribute *mattr,
return l;
}
-static struct module_attribute modinfo_taint =
+static const struct module_attribute modinfo_taint =
__ATTR(taint, 0444, show_taint, NULL);
-struct module_attribute *modinfo_attrs[] = {
+const struct module_attribute *const modinfo_attrs[] = {
&module_uevent,
&modinfo_version,
&modinfo_srcversion,
@@ -1027,7 +1027,7 @@ struct module_attribute *modinfo_attrs[] = {
NULL,
};
-size_t modinfo_attrs_count = ARRAY_SIZE(modinfo_attrs);
+const size_t modinfo_attrs_count = ARRAY_SIZE(modinfo_attrs);
static const char vermagic[] = VERMAGIC_STRING;
@@ -1681,7 +1681,7 @@ static void module_license_taint_check(struct module *mod, const char *license)
static void setup_modinfo(struct module *mod, struct load_info *info)
{
- struct module_attribute *attr;
+ const struct module_attribute *attr;
int i;
for (i = 0; (attr = modinfo_attrs[i]); i++) {
@@ -1692,7 +1692,7 @@ static void setup_modinfo(struct module *mod, struct load_info *info)
static void free_modinfo(struct module *mod)
{
- struct module_attribute *attr;
+ const struct module_attribute *attr;
int i;
for (i = 0; (attr = modinfo_attrs[i]); i++) {
diff --git a/kernel/module/sysfs.c b/kernel/module/sysfs.c
index 456358e1fdc43e6b5b24f383bbefa37812971174..31e7f305540708582d95a83bdc865aaa28e27005 100644
--- a/kernel/module/sysfs.c
+++ b/kernel/module/sysfs.c
@@ -275,7 +275,7 @@ static int add_usage_links(struct module *mod)
static void module_remove_modinfo_attrs(struct module *mod, int end)
{
- struct module_attribute *attr;
+ const struct module_attribute *attr;
int i;
for (i = 0; (attr = &mod->modinfo_attrs[i]); i++) {
@@ -293,7 +293,7 @@ static void module_remove_modinfo_attrs(struct module *mod, int end)
static int module_add_modinfo_attrs(struct module *mod)
{
- struct module_attribute *attr;
+ const struct module_attribute *attr;
struct module_attribute *temp_attr;
int error = 0;
int i;
diff --git a/kernel/params.c b/kernel/params.c
index 763261a7fef94d02503fa0d365d155c223fc382b..0074d29c9b80ced537bba29c33972c998de60864 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -538,7 +538,7 @@ const struct kernel_param_ops param_ops_string = {
EXPORT_SYMBOL(param_ops_string);
/* sysfs output in /sys/modules/XYZ/parameters/ */
-#define to_module_attr(n) container_of(n, struct module_attribute, attr)
+#define to_module_attr(n) container_of_const(n, struct module_attribute, attr)
#define to_module_kobject(n) container_of(n, struct module_kobject, kobj)
struct param_attribute
@@ -557,7 +557,7 @@ struct module_param_attrs
#ifdef CONFIG_SYSFS
#define to_param_attr(n) container_of_const(n, struct param_attribute, mattr)
-static ssize_t param_attr_show(struct module_attribute *mattr,
+static ssize_t param_attr_show(const struct module_attribute *mattr,
struct module_kobject *mk, char *buf)
{
int count;
@@ -573,7 +573,7 @@ static ssize_t param_attr_show(struct module_attribute *mattr,
}
/* sysfs always hands a nul-terminated string in buf. We rely on that. */
-static ssize_t param_attr_store(struct module_attribute *mattr,
+static ssize_t param_attr_store(const struct module_attribute *mattr,
struct module_kobject *mk,
const char *buf, size_t len)
{
@@ -857,7 +857,7 @@ static void __init param_sysfs_builtin(void)
}
}
-ssize_t __modver_version_show(struct module_attribute *mattr,
+ssize_t __modver_version_show(const struct module_attribute *mattr,
struct module_kobject *mk, char *buf)
{
const struct module_version_attribute *vattr =
@@ -892,7 +892,7 @@ static ssize_t module_attr_show(struct kobject *kobj,
struct attribute *attr,
char *buf)
{
- struct module_attribute *attribute;
+ const struct module_attribute *attribute;
struct module_kobject *mk;
int ret;
@@ -911,7 +911,7 @@ static ssize_t module_attr_store(struct kobject *kobj,
struct attribute *attr,
const char *buf, size_t len)
{
- struct module_attribute *attribute;
+ const struct module_attribute *attribute;
struct module_kobject *mk;
int ret;
--
2.47.1
