Commit ea01e798 authored by Rusty Russell's avatar Rusty Russell
Browse files

module: reduce module image and resident size 



Resulting reduction (x86-64, gcc 4.1.2) with my (special purpose, i.e.
much reduced) configurations:
- 16k kernel resident size
- 180k module resident size
- 10k module image size

Signed-off-by: default avatarJan Beulich <jbeulich@novell.com>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent a58730c4

include/linux/module.h

+1 −1
Original line number Diff line number Diff line
@@ -190,7 +190,7 @@ void *__symbol_get_gpl(const char *symbol); 
	extern typeof(sym) sym;					\

	__CRC_SYMBOL(sym, sec)					\

	static const char __kstrtab_##sym[]			\

	__attribute__((section("__ksymtab_strings")))		\

	__attribute__((section("__ksymtab_strings"), aligned(1))) \

	= MODULE_SYMBOL_PREFIX #sym;                    	\

	static const struct kernel_symbol __ksymtab_##sym	\

	__used							\

kernel/module.c

+2 −1
Original line number Diff line number Diff line
@@ -1828,8 +1828,9 @@ static struct module *load_module(void __user *umod, 
	unwindex = find_sec(hdr, sechdrs, secstrings, ARCH_UNWIND_SECTION_NAME);

#endif



	/* Don't keep modinfo section */

	/* Don't keep modinfo and version sections. */

	sechdrs[infoindex].sh_flags &= ~(unsigned long)SHF_ALLOC;

	sechdrs[versindex].sh_flags &= ~(unsigned long)SHF_ALLOC;

#ifdef CONFIG_KALLSYMS

	/* Keep symbol and string tables for decoding later. */

	sechdrs[symindex].sh_flags |= SHF_ALLOC;

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