| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.1 032/123] ARC: Override toplevel default -O2 with -O3 | Date | Sat, 8 Aug 2015 15:08:30 -0700 |
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4.1-stable review patch. If anyone has any objections, please let me know.
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From: Vineet Gupta <vgupta@synopsys.com>
commit 97709069214eb75312c14946803b9da4d3814203 upstream.
ARC kernels have historically been built with -O3, despite top level Makefile defaulting to -O2. This was facilitated by implicitly ordering of arch makefile include AFTER top level assigned -O2.
An upstream fix to top level a1c48bb160f ("Makefile: Fix unrecognized cross-compiler command line options") changed the ordering, making ARC -O3 defunct.
Fix that by NOT relying on any ordering whatsoever and use the proper arch override facility now present in kbuild (ARCH_*FLAGS)
Depends-on: ("kbuild: Allow arch Makefiles to override {cpp,ld,c}flags") Suggested-by: Michal Marek <mmarek@suse.cz> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- arch/arc/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/arch/arc/Makefile +++ b/arch/arc/Makefile @@ -43,7 +43,8 @@ endif ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE # Generic build system uses -O2, we want -O3 -cflags-y += -O3 +# Note: No need to add to cflags-y as that happens anyways +ARCH_CFLAGS += -O3 endif # small data is default for elf32 tool-chain. If not usable, disable it
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