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csky: Fixup ftrace modify panic

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[ 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@linux.alibaba.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Guo Ren 2020-02-02 09:58:42 +08:00 • committed by Greg Kroah-Hartman
commit 3469dfd86e
1 changed files with 2 additions and 0 deletions
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2
arch/csky/mm/Makefile
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@ -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