Btrfs: fix remap_file_pages error
when we use remap_file_pages() to remap a file, remap_file_pages always return error. It is because btrfs didn't set VM_CAN_NONLINEAR for vma. Signed-off-by:Miao Xie <miaox@cn.fujitsu.com> Signed-off-by:
Chris Mason <chris.mason@oracle.com>
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0e4dcbef
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