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csky: fixup abiv2 mmap(... O_SYNC) failed.
Glibc function mmap(... O_SYNC) will make page to _PAGE_UNCACHE + _PAGE_SO and strong-order page couldn't support unalignment access. So remove _PAGE_SO from _PAGE_UNCACHE, also sync abiv1 with the macro of _PAGE_SO. Signed-off-by: Guo Ren <[email protected]> Reported-by: Liu Renwei <[email protected]> Tested-by: Yuan Qiyun <[email protected]>
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