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由 Filipe Manana 提交于
Move the code that is responsible for dropping extents in a range out of btrfs_punch_hole() into a new helper function, btrfs_punch_hole_range(), so that later it can be used by the reflinking (extent cloning and dedup) code to fix a ENOSPC bug. Signed-off-by: NFilipe Manana <fdmanana@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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