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csky: Fixup ftrace modify panic
authorGuo Ren <guoren@linux.alibaba.com>
Sun, 2 Feb 2020 01:58:42 +0000 (09:58 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 12 Mar 2020 06:18:28 +0000 (07:18 +0100)
commite922549584bcfcd4e78711e5de7ec3e4cd649352
treec0fff400cd57a2bd1fa93e795cd39e4759c4a301tree
parentae9097017b332e809a702415b11c7ea1f1c64d08commit | diff
csky: Fixup ftrace modify panic

[ 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>
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