btrfs: define separate btrfs_set/get_XX helpers

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There are helpers for all type widths defined via macro and optionally
can use a token which is a cached pointer to avoid repeated mapping of
the extent buffer.

The token value is known at compile time, when it's valid it's always
address of a local variable, otherwise it's NULL passed by the
token-less helpers.

This can be utilized to remove some branching as the helpers are used
frequenlty.

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

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This commit is contained in:

David Sterba 2019-08-09 17:12:38 +02:00

parent 6ff49c6ad2

commit cb49511328

2 changed files with 55 additions and 11 deletions

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15

fs/btrfs/ctree.h

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51

fs/btrfs/struct-funcs.c

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