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authorSergey Vlasov <vsu@altlinux.ru>2006-06-26 11:59:32 (GMT)
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-26 17:48:21 (GMT)
commit409f89e0efcfea1a8b25f9c4a050c0cf1f1cb87c (patch)
tree21ce71ccd66e34c6a9be99da0703ba808b773eca /arch/x86_64
parent899ced0dd9457b9c349663ca4cb4ec09167728a6 (diff)
downloadlinux-409f89e0efcfea1a8b25f9c4a050c0cf1f1cb87c.tar.xz
[PATCH] x86_64: Do not use -ffunction-sections for modules
Currently CONFIG_REORDER uses -ffunction-sections for all code; however, creating a separate section for each function is not useful for modules and just adds bloat. Moving this option from CFLAGS to CFLAGS_KERNEL shrinks module object files (e.g., the module tree for a kernel built with most drivers as modules shrinked from 54M to 46M), and decreases the number of sysfs files in /sys/module/*/sections/ directories. Signed-off-by: Sergey Vlasov <vsu@altlinux.ru> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64')
-rw-r--r--arch/x86_64/Makefile4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86_64/Makefile b/arch/x86_64/Makefile
index e573e2a..431bb4b 100644
--- a/arch/x86_64/Makefile
+++ b/arch/x86_64/Makefile
@@ -27,6 +27,7 @@ LDFLAGS_vmlinux :=
CHECKFLAGS += -D__x86_64__ -m64
cflags-y :=
+cflags-kernel-y :=
cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
@@ -35,7 +36,7 @@ cflags-y += -m64
cflags-y += -mno-red-zone
cflags-y += -mcmodel=kernel
cflags-y += -pipe
-cflags-$(CONFIG_REORDER) += -ffunction-sections
+cflags-kernel-$(CONFIG_REORDER) += -ffunction-sections
# this makes reading assembly source easier, but produces worse code
# actually it makes the kernel smaller too.
cflags-y += -fno-reorder-blocks
@@ -55,6 +56,7 @@ cflags-y += $(call cc-option,-funit-at-a-time)
cflags-y += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
CFLAGS += $(cflags-y)
+CFLAGS_KERNEL += $(cflags-kernel-y)
AFLAGS += -m64
head-y := arch/x86_64/kernel/head.o arch/x86_64/kernel/head64.o arch/x86_64/kernel/init_task.o