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e4f8df86 Mon May 03 10:05:29 CDT 2021 Al Viro <viro@zeniv.linux.org.uk> [xarray] iov_iter_npages(): just use DIV_ROUND_UP()Compiler is capable of recognizing division by power of 2 and turningit into shifts.Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>