jbd2: reduce journal_head size

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Remove unused t_cow_tid field (ext4 copy-on-write support doesn't seem
to be happening) and change b_modified and b_jlist to bitfields thus
saving 8 bytes in the structure.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>

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Jan Kara 2013-04-12 00:03:42 -04:00 • committed by Theodore Ts'o

parent 7b001d6a0c

commit ae4647fb76

1 changed files with 2 additions and 9 deletions

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include/linux/journal-head.h

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