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btrfs: lzo: document the compressed data format
authorQu Wenruo <wqu@suse.com>
Thu, 17 May 2018 05:10:01 +0000 (13:10 +0800)
committerDavid Sterba <dsterba@suse.com>
Tue, 29 May 2018 16:13:00 +0000 (18:13 +0200)
commit2a1f7c0cbddae68a34096d056fc7ff7b171bab17
tree16ceb972e6301404c21e50c45af6dc2ae8e05037
parentd5c1d68fdeeecd130d60007522c5db179e47e3d2
btrfs: lzo: document the compressed data format

Although it's not that complex, but such comment could still save
several minutes for newer reader/reviewer instead of inferring that from
the code.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ minor wording updates ]
Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/lzo.c