From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> [ Upstream commit 359ae00d12589c31cf103894d0f32588d523ca83 ] During ftrace init, linux will replace all function prologues (call_mcout) with nops, but it need flush_dcache and invalidate_icache to make it work. So flush_cache functions couldn't be nested called by ftrace framework. Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- arch/csky/mm/Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/csky/mm/Makefile b/arch/csky/mm/Makefile index c94ef64810986..efb7ebab342b3 100644 --- a/arch/csky/mm/Makefile +++ b/arch/csky/mm/Makefile @@ -1,8 +1,10 @@ # SPDX-License-Identifier: GPL-2.0-only ifeq ($(CONFIG_CPU_HAS_CACHEV2),y) obj-y += cachev2.o +CFLAGS_REMOVE_cachev2.o = $(CC_FLAGS_FTRACE) else obj-y += cachev1.o +CFLAGS_REMOVE_cachev1.o = $(CC_FLAGS_FTRACE) endif obj-y += dma-mapping.o -- 2.20.1
