riscv: kasan: use local_tlb_flush_all() to avoid uninitialized __sbi_rfence

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It fails to boot the v5.8-rc4 kernel with CONFIG_KASAN because kasan_init
and kasan_early_init use uninitialized __sbi_rfence as executing the
tlb_flush_all(). Actually, at this moment, only the CPU which is
responsible for the system initialization enables the MMU. Other CPUs are
parking at the .Lsecondary_start. Hence the tlb_flush_all() is able to be
replaced by local_tlb_flush_all() to avoid using uninitialized
__sbi_rfence.

Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

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Vincent Chen 2020-07-10 10:40:54 +08:00 • committed by Palmer Dabbelt

parent ba47d845d7

commit 4cb699d044

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arch/riscv/mm/kasan_init.c

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