btrfs: store precalculated csum_size in fs_info

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In many places we need the checksum size and it is inefficient to read
it from the raw superblock. Store the value into fs_info, actual use
will be in followup patches.  The size is u32 as it allows to generate
better assembly than with u16.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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David Sterba 2020-07-02 11:10:18 +02:00

parent 265fdfa6ce

commit 22b6331d96

2 changed files with 2 additions and 0 deletions

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fs/btrfs/ctree.h

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1

fs/btrfs/disk-io.c

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