ntfs: punch all-zero compressed blocks

When a rewritten compression block consists entirely of zeroes,
ntfs_write_cb() returns without replacing its existing runlist mapping.
The old on-disk contents therefore remain visible after cache eviction.

Punch the compression unit so that reads resolve it as a sparse block and
release any clusters that held the previous contents.

Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

0 files changed, 0 insertions, 0 deletions