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Revision 0e2c09011d4de4161f615ff860a605a9186cf62a authored by Atish Patra on 17 June 2020, 20:37:32 UTC, committed by Palmer Dabbelt on 19 June 2020, 01:46:09 UTC 
RISC-V: Acquire mmap lock before invoking walk_page_range
 
As per walk_page_range documentation, mmap lock should be acquired by the
caller before invoking walk_page_range. mmap_assert_locked gets triggered
without that. The details can be found here.

http://lists.infradead.org/pipermail/linux-riscv/2020-June/010335.html

Fixes: 395a21ff859c(riscv: add ARCH_HAS_SET_DIRECT_MAP support)
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Michel Lespinasse <walken@google.com>
Reviewed-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
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