Commit-ID: 63fea0af43af5beb3779fd2cae078d5d77b4bb11
Gitweb: https://git.kernel.org/tip/63fea0af43af5beb3779fd2cae078d5d77b4bb11
Author: Masahiro Yamada <[email protected]>
AuthorDate: Mon, 12 Nov 2018 11:35:20 +0900
Committer: Borislav Petkov <[email protected]>
CommitDate: Sun, 9 Dec 2018 11:55:32 +0100
x86, powerpc: Remove -funit-at-a-time compiler option entirely
GCC 4.6 manual says:
-funit-at-a-time
This option is left for compatibility reasons. -funit-at-a-time has
no effect, while -fno-unit-at-a-time implies -fno-toplevel-reorder
and -fno-section-anchors. Enabled by default.
Remove it.
Signed-off-by: Masahiro Yamada <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Ingo Molnar <[email protected]>
Acked-by: Michael Ellerman <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Richard Weinberger <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: x86-ml <[email protected]>
Link:
https://lkml.kernel.org/r/[email protected]
---
arch/powerpc/Makefile | 4 ----
arch/x86/Makefile | 4 ----
arch/x86/Makefile.um | 5 -----
3 files changed, 13 deletions(-)
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 8a2ce14d68d0..854199c9ab7e 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -228,10 +228,6 @@ KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
KBUILD_CFLAGS += $(call cc-option,-mno-spe)
KBUILD_CFLAGS += $(call cc-option,-mspe=no)
-# Enable unit-at-a-time mode when possible. It shrinks the
-# kernel considerably.
-KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
-
# FIXME: the module load should be taught about the additional relocs
# generated by this.
# revert to pre-gcc-4.4 behaviour of .eh_frame
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index f5d7f4134524..58d82e9dc36d 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -130,10 +130,6 @@ else
KBUILD_CFLAGS += -mno-red-zone
KBUILD_CFLAGS += -mcmodel=kernel
-
- # -funit-at-a-time shrinks the kernel .text considerably
- # unfortunately it makes reading oopses harder.
- KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
endif
ifdef CONFIG_X86_X32
diff --git a/arch/x86/Makefile.um b/arch/x86/Makefile.um
index 577976b7d1f8..1db7913795f5 100644
--- a/arch/x86/Makefile.um
+++ b/arch/x86/Makefile.um
@@ -26,9 +26,6 @@ cflags-y += $(call cc-option,-mpreferred-stack-boundary=2)
# an unresolved reference.
cflags-y += -ffreestanding
-# gcc 4.3.0 needs -funit-at-a-time for extern inline functions.
-KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
-
KBUILD_CFLAGS += $(cflags-y)
else
@@ -50,6 +47,4 @@ ELF_FORMAT := elf64-x86-64
LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib64
LINK-y += -m64
-# Do unit-at-a-time unconditionally on x86_64, following the host
-KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
endif
