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authorRusty Russell <rusty@rustcorp.com.au>2008-03-13 09:02:17 +0000
committerRusty Russell <rusty@rustcorp.com.au>2008-05-01 21:14:59 +1000
commitea01e798e2d27fd04142e0473ca36570fa9d9218 (patch)
tree717ad87d4c38dd6bed15ba4dfdfaea8f33411367
parenta58730c42174672fe0012a4edbe3e38f94ef2bad (diff)
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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: Jan Beulich <jbeulich@novell.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
-rw-r--r--include/linux/module.h2
-rw-r--r--kernel/module.c3
2 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/module.h b/include/linux/module.h
index a29c2ebb7c38..3e03b1acbc94 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -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 \
diff --git a/kernel/module.c b/kernel/module.c
index b0d7c2a41bd9..031bf26af8ea 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -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;