btrfs: update stale comment for count_range_bits()

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The comment for count_range_bits() mentions that the search is fast if we
are asking for a range with the EXTENT_DIRTY bit set. However that is no
longer true since we don't use that bit and the optimization for that was
removed in:

  commit 71528e9e16 ("btrfs: get rid of extent_io_tree::dirty_bytes")

So remove that part of the comment mentioning the no longer existing
optimized case, and, while at it, add proper documentation describing the
purpose, arguments and return value of the function.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

...

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Filipe Manana 2022-11-11 11:50:33 +00:00 • committed by David Sterba

parent 8c6e53a79d

commit 1ee51a0625

1 changed files with 23 additions and 3 deletions

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fs/btrfs/extent-io-tree.c

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