btrfs: remove redundant csum buffer in btrfs_io_bio

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The io_bio tracks checksums and has an inline buffer or an allocated
one. And there's a third member that points to the right one, but we
don't need to use an extra pointer for that. Let btrfs_io_bio::csum
point to the right buffer and check that the inline buffer is not
accidentally freed.

This shrinks struct btrfs_io_bio by 8 bytes.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: David Sterba <dsterba@suse.com>

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This commit is contained in:

David Sterba 2018-11-22 17:16:46 +01:00

parent 600b6cf468

commit 31fecccbd7

2 changed files with 7 additions and 6 deletions

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12

fs/btrfs/file-item.c

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1

fs/btrfs/volumes.h

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