btrfs: zoned: add asserts on splitting extent_map
We call split_zoned_em() on an extent_map on submitting a bio for it. Thus, we can assume the extent_map is PINNED, not LOGGING, and in the modified list. Add ASSERT()s to ensure the extent_maps after the split also has the proper flags set and are in the modified list. Suggested-by: NFilipe Manana <fdmanana@suse.com> Reviewed-by: NJohannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: NNaohiro Aota <naohiro.aota@wdc.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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