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powerpc/build: Remove -pipe from compilation flags
authorNicholas Piggin <npiggin@gmail.com>
Tue, 6 Jun 2023 06:48:30 +0000 (16:48 +1000)
committerMichael Ellerman <mpe@ellerman.id.au>
Wed, 14 Jun 2023 02:46:42 +0000 (12:46 +1000)
x86 removed -pipe in commit 437e88ab8f9e2 ("x86/build: Remove -pipe from
KBUILD_CFLAGS") and the newer arm64 and riscv seem to have never used it,
so that seems to be the way the world's going.

Compile performance building defconfig on a POWER10 PowerNV system
was in the noise after 10 builds each. No point in adding options unless
they help something, so remove it.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230606064830.184083-1-npiggin@gmail.com
arch/powerpc/Makefile patch | blob | history
arch/powerpc/boot/Makefile patch | blob | history

diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index dca73f6..76fc7cc 100644 (file)
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -166,7 +166,7 @@ asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
 KBUILD_CPPFLAGS        += -I $(srctree)/arch/$(ARCH) $(asinstr)
 KBUILD_AFLAGS  += $(AFLAGS-y)
 KBUILD_CFLAGS  += $(call cc-option,-msoft-float)
-KBUILD_CFLAGS  += -pipe $(CFLAGS-y)
+KBUILD_CFLAGS  += $(CFLAGS-y)
 CPP            = $(CC) -E $(KBUILD_CFLAGS)
 
 CHECKFLAGS     += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 6f9ef03..bf89765 100644 (file)
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -71,7 +71,7 @@ endif
 BOOTCPPFLAGS   := -nostdinc $(LINUXINCLUDE)
 BOOTCPPFLAGS   += -isystem $(shell $(BOOTCC) -print-file-name=include)
 
-BOOTCFLAGS     := -pipe $(BOOTTARGETFLAGS) \
+BOOTCFLAGS     := $(BOOTTARGETFLAGS) \
                   -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
                   -fno-strict-aliasing -O2 \
                   -msoft-float -mno-altivec -mno-vsx \
@@ -81,7 +81,7 @@ BOOTCFLAGS    := -pipe $(BOOTTARGETFLAGS) \
                   $(call cc-option,-mno-spe) $(call cc-option,-mspe=no) \
                   -fomit-frame-pointer -fno-builtin -fPIC
 
-BOOTAFLAGS     := -pipe $(BOOTTARGETFLAGS) -D__ASSEMBLY__
+BOOTAFLAGS     := $(BOOTTARGETFLAGS) -D__ASSEMBLY__
 
 BOOTARFLAGS    := -crD
 
Domain: System / Kernel;