You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
190 lines
6.7 KiB
190 lines
6.7 KiB
From: Felix Fietkau <nbd@nbd.name>
|
|
Subject: [PATCH] build: add a hack for removing non-essential module info
|
|
|
|
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
---
|
|
--- a/include/linux/module.h
|
|
+++ b/include/linux/module.h
|
|
@@ -169,6 +169,7 @@ void trim_init_extable(struct module *m)
|
|
|
|
/* Generic info of form tag = "info" */
|
|
#define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
|
|
+#define MODULE_INFO_STRIP(tag, info) __MODULE_INFO_STRIP(tag, tag, info)
|
|
|
|
/* For userspace: you can also call me... */
|
|
#define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
|
|
@@ -212,12 +213,12 @@ void trim_init_extable(struct module *m)
|
|
* Author(s), use "Name <email>" or just "Name", for multiple
|
|
* authors use multiple MODULE_AUTHOR() statements/lines.
|
|
*/
|
|
-#define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
|
|
+#define MODULE_AUTHOR(_author) MODULE_INFO_STRIP(author, _author)
|
|
|
|
/* What your module does. */
|
|
-#define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
|
|
+#define MODULE_DESCRIPTION(_description) MODULE_INFO_STRIP(description, _description)
|
|
|
|
-#ifdef MODULE
|
|
+#if defined(MODULE) && !defined(CONFIG_MODULE_STRIPPED)
|
|
/* Creates an alias so file2alias.c can find device table. */
|
|
#define MODULE_DEVICE_TABLE(type, name) \
|
|
extern const typeof(name) __mod_##type##__##name##_device_table \
|
|
@@ -244,7 +245,9 @@ extern const typeof(name) __mod_##type##
|
|
*/
|
|
|
|
#if defined(MODULE) || !defined(CONFIG_SYSFS)
|
|
-#define MODULE_VERSION(_version) MODULE_INFO(version, _version)
|
|
+#define MODULE_VERSION(_version) MODULE_INFO_STRIP(version, _version)
|
|
+#elif defined(CONFIG_MODULE_STRIPPED)
|
|
+#define MODULE_VERSION(_version) __MODULE_INFO_DISABLED(version)
|
|
#else
|
|
#define MODULE_VERSION(_version) \
|
|
static struct module_version_attribute ___modver_attr = { \
|
|
@@ -266,7 +269,7 @@ extern const typeof(name) __mod_##type##
|
|
/* Optional firmware file (or files) needed by the module
|
|
* format is simply firmware file name. Multiple firmware
|
|
* files require multiple MODULE_FIRMWARE() specifiers */
|
|
-#define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
|
|
+#define MODULE_FIRMWARE(_firmware) MODULE_INFO_STRIP(firmware, _firmware)
|
|
|
|
/* Given an address, look for it in the exception tables */
|
|
const struct exception_table_entry *search_exception_tables(unsigned long add);
|
|
--- a/include/linux/moduleparam.h
|
|
+++ b/include/linux/moduleparam.h
|
|
@@ -16,6 +16,16 @@
|
|
/* Chosen so that structs with an unsigned long line up. */
|
|
#define MAX_PARAM_PREFIX_LEN (64 - sizeof(unsigned long))
|
|
|
|
+/* This struct is here for syntactic coherency, it is not used */
|
|
+#define __MODULE_INFO_DISABLED(name) \
|
|
+ struct __UNIQUE_ID(name) {}
|
|
+
|
|
+#ifdef CONFIG_MODULE_STRIPPED
|
|
+#define __MODULE_INFO_STRIP(tag, name, info) __MODULE_INFO_DISABLED(name)
|
|
+#else
|
|
+#define __MODULE_INFO_STRIP(tag, name, info) __MODULE_INFO(tag, name, info)
|
|
+#endif
|
|
+
|
|
#ifdef MODULE
|
|
#define __MODULE_INFO(tag, name, info) \
|
|
static const char __UNIQUE_ID(name)[] \
|
|
@@ -23,8 +33,7 @@ static const char __UNIQUE_ID(name)[]
|
|
= __stringify(tag) "=" info
|
|
#else /* !MODULE */
|
|
/* This struct is here for syntactic coherency, it is not used */
|
|
-#define __MODULE_INFO(tag, name, info) \
|
|
- struct __UNIQUE_ID(name) {}
|
|
+#define __MODULE_INFO(tag, name, info) __MODULE_INFO_DISABLED(name)
|
|
#endif
|
|
#define __MODULE_PARM_TYPE(name, _type) \
|
|
__MODULE_INFO(parmtype, name##type, #name ":" _type)
|
|
@@ -32,7 +41,7 @@ static const char __UNIQUE_ID(name)[]
|
|
/* One for each parameter, describing how to use it. Some files do
|
|
multiple of these per line, so can't just use MODULE_INFO. */
|
|
#define MODULE_PARM_DESC(_parm, desc) \
|
|
- __MODULE_INFO(parm, _parm, #_parm ":" desc)
|
|
+ __MODULE_INFO_STRIP(parm, _parm, #_parm ":" desc)
|
|
|
|
struct kernel_param;
|
|
|
|
--- a/init/Kconfig
|
|
+++ b/init/Kconfig
|
|
@@ -2026,6 +2026,13 @@ config MODULE_COMPRESS_XZ
|
|
|
|
endchoice
|
|
|
|
+config MODULE_STRIPPED
|
|
+ bool "Reduce module size"
|
|
+ depends on MODULES
|
|
+ help
|
|
+ Remove module parameter descriptions, author info, version, aliases,
|
|
+ device tables, etc.
|
|
+
|
|
endif # MODULES
|
|
|
|
config MODULES_TREE_LOOKUP
|
|
--- a/kernel/module.c
|
|
+++ b/kernel/module.c
|
|
@@ -2864,6 +2864,7 @@ static struct module *setup_load_info(st
|
|
|
|
static int check_modinfo(struct module *mod, struct load_info *info, int flags)
|
|
{
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
const char *modmagic = get_modinfo(info, "vermagic");
|
|
int err;
|
|
|
|
@@ -2889,6 +2890,7 @@ static int check_modinfo(struct module *
|
|
pr_warn("%s: module is from the staging directory, the quality "
|
|
"is unknown, you have been warned.\n", mod->name);
|
|
}
|
|
+#endif
|
|
|
|
/* Set up license info based on the info section */
|
|
set_license(mod, get_modinfo(info, "license"));
|
|
--- a/scripts/mod/modpost.c
|
|
+++ b/scripts/mod/modpost.c
|
|
@@ -1963,7 +1963,9 @@ static void read_symbols(char *modname)
|
|
symname = remove_dot(info.strtab + sym->st_name);
|
|
|
|
handle_modversions(mod, &info, sym, symname);
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
handle_moddevtable(mod, &info, sym, symname);
|
|
+#endif
|
|
}
|
|
if (!is_vmlinux(modname) ||
|
|
(is_vmlinux(modname) && vmlinux_section_warnings))
|
|
@@ -2107,7 +2109,9 @@ static void add_header(struct buffer *b,
|
|
buf_printf(b, "#include <linux/vermagic.h>\n");
|
|
buf_printf(b, "#include <linux/compiler.h>\n");
|
|
buf_printf(b, "\n");
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
buf_printf(b, "MODULE_INFO(vermagic, VERMAGIC_STRING);\n");
|
|
+#endif
|
|
buf_printf(b, "\n");
|
|
buf_printf(b, "__visible struct module __this_module\n");
|
|
buf_printf(b, "__attribute__((section(\".gnu.linkonce.this_module\"))) = {\n");
|
|
@@ -2124,16 +2128,20 @@ static void add_header(struct buffer *b,
|
|
|
|
static void add_intree_flag(struct buffer *b, int is_intree)
|
|
{
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
if (is_intree)
|
|
buf_printf(b, "\nMODULE_INFO(intree, \"Y\");\n");
|
|
+#endif
|
|
}
|
|
|
|
static void add_staging_flag(struct buffer *b, const char *name)
|
|
{
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
static const char *staging_dir = "drivers/staging";
|
|
|
|
if (strncmp(staging_dir, name, strlen(staging_dir)) == 0)
|
|
buf_printf(b, "\nMODULE_INFO(staging, \"Y\");\n");
|
|
+#endif
|
|
}
|
|
|
|
/* In kernel, this size is defined in linux/module.h;
|
|
@@ -2237,11 +2245,13 @@ static void add_depends(struct buffer *b
|
|
|
|
static void add_srcversion(struct buffer *b, struct module *mod)
|
|
{
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
if (mod->srcversion[0]) {
|
|
buf_printf(b, "\n");
|
|
buf_printf(b, "MODULE_INFO(srcversion, \"%s\");\n",
|
|
mod->srcversion);
|
|
}
|
|
+#endif
|
|
}
|
|
|
|
static void write_if_changed(struct buffer *b, const char *fname)
|
|
@@ -2475,7 +2485,9 @@ int main(int argc, char **argv)
|
|
add_staging_flag(&buf, mod->name);
|
|
err |= add_versions(&buf, mod);
|
|
add_depends(&buf, mod, modules);
|
|
+#ifndef CONFIG_MODULE_STRIPPED
|
|
add_moddevtable(&buf, mod);
|
|
+#endif
|
|
add_srcversion(&buf, mod);
|
|
|
|
sprintf(fname, "%s.mod.c", mod->name);
|
|
|