From b13812ddea615b6507beef24f76540c0c1143c5c Mon Sep 17 00:00:00 2001 From: Jiaxun Yang Date: Wed, 23 Sep 2020 18:33:12 +0800 Subject: [PATCH] MIPS: Loongson2ef: Disable Loongson MMI instructions It was missed when I was forking Loongson2ef from Loongson64 but should be applied to Loongson2ef as march=loongson2f will also enable Loongson MMI in GCC-9+. Signed-off-by: Jiaxun Yang Fixes: 71e2f4dd5a65 ("MIPS: Fork loongson2ef from loongson64") Reported-by: Thomas Bogendoerfer Cc: stable@vger.kernel.org # v5.8+ Signed-off-by: Thomas Bogendoerfer --- arch/mips/loongson2ef/Platform | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/mips/loongson2ef/Platform b/arch/mips/loongson2ef/Platform index 4ab55f1123a0..ae023b9a1c51 100644 --- a/arch/mips/loongson2ef/Platform +++ b/arch/mips/loongson2ef/Platform @@ -44,6 +44,10 @@ ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS endif endif +# Some -march= flags enable MMI instructions, and GCC complains about that +# support being enabled alongside -msoft-float. Thus explicitly disable MMI. +cflags-y += $(call cc-option,-mno-loongson-mmi) + # # Loongson Machines' Support # -- 2.11.0