[PATCH 4/4] erofs: add REQ_RAHEAD flag to readahead requests

[Chao Yu]

On 2020/9/18 21:54, Gao Xiang wrote:
> Let's add REQ_RAHEAD flag so it'd be easier to identify
> readahead I/O requests in blktrace.
> 
> Signed-off-by: Gao Xiang <hsiangkao at redhat.com>

Reviewed-by: Chao Yu <yuchao0 at huawei.com>

Thanks,