openwrt/target/linux/generic/hack-5.15/204-module_strip.patch
Rui Salvaterra 251a382c28 kernel: bump 5.15 to 5.15.46
Deleted (upstreamed):
generic/backport-5.15/400-mtdblock-warn-if-opened-on-NAND.patch [01]
generic/backport-5.15/420-v5.19-01-mtd-spinand-gigadevice-fix-Quad-IO-for-GD5F1GQ5UExxG.patch [02]
bcm27xx/patches-5.15/950-0029-Revert-mailbox-avoid-timer-start-from-callback.patch [03]
bcm27xx/patches-5.15/950-0417-bcm2711_thermal-Don-t-clamp-temperature-at-zero.patch [04]
bcm27xx/patches-5.15/950-0740-drm-vc4-hvs-Fix-frame-count-register-readout.patch [05]
bcm27xx/patches-5.15/950-0755-drm-vc4-hvs-Reset-muxes-at-probe-time.patch [06]
bcm27xx/patches-5.15/950-0759-drm-vc4-txp-Don-t-set-TXP_VSTART_AT_EOF.patch [07]
bcm27xx/patches-5.15/950-0760-drm-vc4-txp-Force-alpha-to-be-0xff-if-it-s-disabled.patch [08]
bcm53xx/patches-5.15/031-v5.17-0005-ARM-dts-BCM5301X-update-CRU-block-description.patch [09]
mediatek/patches-5.15/102-mt7629-enable-arch-timer.patch [10]

Manually rebased:
bcm27xx/patches-5.15/950-0741-drm-vc4-hvs-Use-pointer-to-HVS-in-HVS_READ-and-HVS_W.patch

[01] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.46&id=f41c9418c5898c01634675150696da290fb86796
[02] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.46&id=d5b66645305c6f3a1b2cf75cee4157b07f293309
[03] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.46&id=119f99209d8531359bcb935f252ec435f9d21b13
[04] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.46&id=c4e1280abead1552e1764684079a43e222ccd163
[05] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.46&id=08465a1889cb48ec64431e9db745b5be15399251
[06] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.46&id=0e26a6da02e63b75b629573d13966c36aa6264f0
[07] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.46&id=01c9020b2e7c85e394879f34851805179ac3d1d8
[08] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.46&id=d47f85cc0171a5d3c5bd8cbb8a98983ca3357cbd
[09] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.46&id=5151f24ac937ff7eb1f078257c66e3c0f0296010
[10] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.46&id=ffea838686b82fbb2801cdfad6ba5309d15c032d

Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
2022-06-27 00:57:16 +02:00

213 lines
6.9 KiB
Diff

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
@@ -164,6 +164,7 @@ 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)
@@ -233,12 +234,12 @@ 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 \
@@ -265,7 +266,9 @@ 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) \
MODULE_INFO(version, _version); \
@@ -288,7 +291,7 @@ 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)
#define MODULE_IMPORT_NS(ns) MODULE_INFO(import_ns, #ns)
--- a/include/linux/moduleparam.h
+++ b/include/linux/moduleparam.h
@@ -20,6 +20,16 @@
/* 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
+
#define __MODULE_INFO(tag, name, info) \
static const char __UNIQUE_ID(name)[] \
__used __section(".modinfo") __aligned(1) \
@@ -31,7 +41,7 @@
/* 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
@@ -2352,6 +2352,13 @@ config UNUSED_KSYMS_WHITELIST
one per line. The path can be absolute, or relative to the kernel
source tree.
+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
@@ -1218,6 +1218,7 @@ static struct module_attribute *modinfo_
static const char vermagic[] = VERMAGIC_STRING;
+#if defined(CONFIG_MODVERSIONS) || !defined(CONFIG_MODULE_STRIPPED)
static int try_to_force_load(struct module *mod, const char *reason)
{
#ifdef CONFIG_MODULE_FORCE_LOAD
@@ -1229,6 +1230,7 @@ static int try_to_force_load(struct modu
return -ENOEXEC;
#endif
}
+#endif
#ifdef CONFIG_MODVERSIONS
@@ -3227,9 +3229,11 @@ static int setup_load_info(struct load_i
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;
@@ -3250,6 +3254,7 @@ 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
@@ -2033,7 +2033,9 @@ static void read_symbols(const char *mod
symname = remove_dot(info.strtab + sym->st_name);
handle_symbol(mod, &info, sym, symname);
+#ifndef CONFIG_MODULE_STRIPPED
handle_moddevtable(mod, &info, sym, symname);
+#endif
}
for (sym = info.symtab_start; sym < info.symtab_stop; sym++) {
@@ -2212,8 +2214,10 @@ static void add_header(struct buffer *b,
buf_printf(b, "BUILD_SALT;\n");
buf_printf(b, "BUILD_LTO_INFO;\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, "__section(\".gnu.linkonce.this_module\") = {\n");
@@ -2230,8 +2234,10 @@ 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 */
@@ -2244,8 +2250,10 @@ static void add_retpoline(struct buffer
static void add_staging_flag(struct buffer *b, const char *name)
{
+#ifndef CONFIG_MODULE_STRIPPED
if (strstarts(name, "drivers/staging"))
buf_printf(b, "\nMODULE_INFO(staging, \"Y\");\n");
+#endif
}
/**
@@ -2325,11 +2333,13 @@ 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_buf(struct buffer *b, const char *fname)
@@ -2578,7 +2588,9 @@ int main(int argc, char **argv)
add_staging_flag(&buf, mod->name);
add_versions(&buf, mod);
add_depends(&buf, mod);
+#ifndef CONFIG_MODULE_STRIPPED
add_moddevtable(&buf, mod);
+#endif
add_srcversion(&buf, mod);
sprintf(fname, "%s.mod.c", mod->name);