Patch "ARC: Override toplevel default -O2 with -O3" has been added to the 4.1-stable tree

Patch "ARC: Override toplevel default -O2 with -O3" has been added to the 4.1-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ARC: Override toplevel default -O2 with -O3

to the 4.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     arc-override-toplevel-default-o2-with-o3.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 97709069214eb75312c14946803b9da4d3814203 Mon Sep 17 00:00:00 2001
From: Vineet Gupta <vgupta@synopsys.com>
Date: Thu, 18 Jun 2015 13:54:01 +0530
Subject: ARC: Override toplevel default -O2 with -O3

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


Patches currently in stable-queue which might be from vgupta@synopsys.com are

queue-4.1/arc-make-sure-instruction_pointer-returns-unsigned-value.patch
queue-4.1/arc-override-toplevel-default-o2-with-o3.patch