MIPS: SB1: Fix excessive kernel warnings.

A kernel build with binutils 2.24 is going to emit warnings like

  CC      kernel/sys.o
{standard input}: Assembler messages:
{standard input}:701: Warning: the 32-bit MIPS architecture does not support the `mdmx' extension
{standard input}:701: Warning: the `mdmx' extension requires 64-bit FPRs
{standard input}:701: Warning: the `mips3d' extension requires MIPS32 revision 2 or greater
{standard input}:701: Warning: the `mips3d' extension requires 64-bit FPRs

for almost every file.  This is caused by changes to gas' interpretation
of .set semantics.  Fixed by explicitly disabling MIPS3D and MDMX for
Sibyte builds.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 1a5b403..60a359c 100644 (file)
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -151,7 +151,7 @@ cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \
                        -Wa,--trap
 cflags-$(CONFIG_CPU_RM7000)    += $(call cc-option,-march=rm7000,-march=r5000) \
                        -Wa,--trap
-cflags-$(CONFIG_CPU_SB1)       += $(call cc-option,-march=sb1,-march=r5000) \
+cflags-$(CONFIG_CPU_SB1)       += $(call cc-option,-march=sb1 -mno-mdmx -mno-mips3d,-march=r5000) \
                        -Wa,--trap
 cflags-$(CONFIG_CPU_R8000)     += -march=r8000 -Wa,--trap
 cflags-$(CONFIG_CPU_R10000)    += $(call cc-option,-march=r10000,-march=r8000) \