From 409f89e0efcfea1a8b25f9c4a050c0cf1f1cb87c Mon Sep 17 00:00:00 2001 From: Sergey Vlasov Date: Mon, 26 Jun 2006 13:59:32 +0200 Subject: [PATCH] [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 Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds --- arch/x86_64/Makefile | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) 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 -- 2.7.4