btrfs: factor out prepare_allocation() for extent allocation

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This function finally factor out prepare_allocation() form
find_free_extent(). This function is called before the allocation loop
and a specific allocator function like prepare_allocation_clustered()
should initialize their private information and can set proper hint_byte
to indicate where to start the allocation with.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Naohiro Aota 2020-02-25 12:56:26 +09:00 • committed by David Sterba

parent 45d8e033b2

commit 7e89540942

1 changed files with 68 additions and 42 deletions

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fs/btrfs/extent-tree.c

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