tree af01d2ccdd528e0af16897984f6e7daa209cf24f
parent 587bd197a0e4c4f021eb8c057391b2f966c5c6a0
author Gao Xiang <gaoxiang25@huawei.com> 1561883911 +0800
committer Gao Xiang <hsiangkao@aol.com> 1564802310 +0800

erofs-utils: introduce dev_fillzero

add dev_fillzero() to fill zero within a range.
FALLOC_FL_PUNCH_HOLE is perferred if supported.

Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>