openwrtv4/target/linux/generic/patches-3.10/003-11-002-MIPS-Only-set-cpu_has_mmips-if-SYS_SUPPORTS_MICROMIP.patch

From 15a051ad98309f71989f9bda4b020fff160f4022 Mon Sep 17 00:00:00 2001
From: David Daney <david.daney@cavium.com>
Date: Fri, 24 May 2013 20:54:10 +0000
Subject: [PATCH 2/2] MIPS: Only set cpu_has_mmips if SYS_SUPPORTS_MICROMIPS

commit 3ddc14add5e6341cf8ef4058c34c67ba7fd15317 upstream.

As Jonas Gorske said in his patch:

   Disable cpu_has_mmips for everything but SEAD3 and MALTA. Most of
   these platforms are from before the micromips introduction, so they
   are very unlikely to implement it.

   Reduces an -Os compiled, uncompressed kernel image by 8KiB for
   BCM63XX.

This patch taks a different approach than his, we gate the runtime
test for microMIPS by the config symbol SYS_SUPPORTS_MICROMIPS.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: Jonas Gorski <jogo@openwrt.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Acked-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5327/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
 arch/mips/include/asm/cpu-features.h |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/arch/mips/include/asm/cpu-features.h
+++ b/arch/mips/include/asm/cpu-features.h
@@ -99,7 +99,11 @@
 #define cpu_has_rixi		(cpu_data[0].options & MIPS_CPU_RIXI)
 #endif
 #ifndef cpu_has_mmips
-#define cpu_has_mmips		(cpu_data[0].options & MIPS_CPU_MICROMIPS)
+# ifdef CONFIG_SYS_SUPPORTS_MICROMIPS
+#  define cpu_has_mmips		(cpu_data[0].options & MIPS_CPU_MICROMIPS)
+# else
+#  define cpu_has_mmips		0
+# endif
 #endif
 #ifndef cpu_has_vtag_icache
 #define cpu_has_vtag_icache	(cpu_data[0].icache.flags & MIPS_CACHE_VTAG)