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authorArjan van de Ven <arjan@linux.intel.com>2006-06-28 15:26:45 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-29 01:59:04 +0400
commitf71d20e961474dde77e6558396efb93d6ac80a4b (patch)
tree669610f79521fd173c28fc47bef39ecd4cdf52ab /include/asm-generic
parentf5e54d6e53a20cef45af7499e86164f0e0d16bb2 (diff)
downloadlinux-f71d20e961474dde77e6558396efb93d6ac80a4b.tar.xz
[PATCH] Add EXPORT_UNUSED_SYMBOL and EXPORT_UNUSED_SYMBOL_GPL
Temporarily add EXPORT_UNUSED_SYMBOL and EXPORT_UNUSED_SYMBOL_GPL. These will be used as a transition measure for symbols that aren't used in the kernel and are on the way out. When a module uses such a symbol, a warning is printk'd at modprobe time. The main reason for removing unused exports is size: eacho export takes roughly between 100 and 150 bytes of kernel space in the binary. This patch gives users the option to immediately get this size gain via a config option. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-generic')
-rw-r--r--include/asm-generic/vmlinux.lds.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 9d11550b4818..db5a3732f106 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -58,6 +58,20 @@
VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
} \
\
+ /* Kernel symbol table: Normal unused symbols */ \
+ __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
+ VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
+ *(__ksymtab_unused) \
+ VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
+ } \
+ \
+ /* Kernel symbol table: GPL-only unused symbols */ \
+ __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
+ VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
+ *(__ksymtab_unused_gpl) \
+ VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
+ } \
+ \
/* Kernel symbol table: GPL-future-only symbols */ \
__ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
@@ -79,6 +93,20 @@
VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
} \
\
+ /* Kernel symbol table: Normal unused symbols */ \
+ __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
+ VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
+ *(__kcrctab_unused) \
+ VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
+ } \
+ \
+ /* Kernel symbol table: GPL-only unused symbols */ \
+ __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
+ VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
+ *(__kcrctab_unused_gpl) \
+ VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
+ } \
+ \
/* Kernel symbol table: GPL-future-only symbols */ \
__kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \