+++ /dev/null
-From a779a482fb9b9f8fcdf8b2519c789b4b9bb5dd05 Mon Sep 17 00:00:00 2001
-From: Felix Fietkau <nbd@nbd.name>
-Date: Fri, 7 Jul 2017 16:56:48 +0200
-Subject: build: add a hack for removing non-essential module info
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
- include/linux/module.h | 13 ++++++++-----
- include/linux/moduleparam.h | 15 ++++++++++++---
- init/Kconfig | 7 +++++++
- kernel/module.c | 5 ++++-
- scripts/mod/modpost.c | 12 ++++++++++++
- 5 files changed, 43 insertions(+), 9 deletions(-)
-
---- a/include/linux/module.h
-+++ b/include/linux/module.h
-@@ -158,6 +158,7 @@ extern void cleanup_module(void);
-
- /* 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)
-@@ -201,12 +202,12 @@ extern void cleanup_module(void);
- * 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 typeof(name) __mod_##type##__##name##_device_table \
-@@ -233,7 +234,9 @@ extern typeof(name) __mod_##type##__##na
- */
-
- #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 = { \
-@@ -255,7 +258,7 @@ extern typeof(name) __mod_##type##__##na
- /* 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)
-
- struct notifier_block;
-
---- a/include/linux/moduleparam.h
-+++ b/include/linux/moduleparam.h
-@@ -17,6 +17,16 @@
- /* 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)[] \
-@@ -24,8 +34,7 @@ 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)
-@@ -33,7 +42,7 @@ 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
-@@ -1903,6 +1903,13 @@ config TRIM_UNUSED_KSYMS
-
- If unsure, or if you need to build out-of-tree modules, say N.
-
-+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
-@@ -3024,9 +3024,11 @@ static struct module *setup_load_info(st
-
- static int check_modinfo(struct module *mod, struct load_info *info, int flags)
- {
-- const char *modmagic = get_modinfo(info, "vermagic");
- int err;
-
-+#ifndef CONFIG_MODULE_STRIPPED
-+ const char *modmagic = get_modinfo(info, "vermagic");
-+
- if (flags & MODULE_INIT_IGNORE_VERMAGIC)
- modmagic = NULL;
-
-@@ -3047,6 +3049,7 @@ static int check_modinfo(struct module *
- mod->name);
- add_taint_module(mod, TAINT_OOT_MODULE, LOCKDEP_STILL_OK);
- }
-+#endif
-
- check_modinfo_retpoline(mod, info);
-
---- a/scripts/mod/modpost.c
-+++ b/scripts/mod/modpost.c
-@@ -1996,7 +1996,9 @@ 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))
-@@ -2157,8 +2159,10 @@ 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");
- buf_printf(b, "MODULE_INFO(name, KBUILD_MODNAME);\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");
-@@ -2175,8 +2179,10 @@ 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
- }
-
- /* Cannot check for assembler */
-@@ -2189,10 +2195,12 @@ static void add_retpoline(struct buffer
-
- 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
- }
-
- /**
-@@ -2291,11 +2299,13 @@ 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)
-@@ -2532,7 +2542,9 @@ 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);
projects / openwrt / openwrt.git / blobdiff