| commit | 932bb305ba2a01cd62809644d569f004e77a4355 | |
| author | Jan Kara <jack@suse.cz> | |
| Wed, 14 Mar 2012 02:45:25 +0000 (13 22:45 -0400) | ||
| committer | Theodore Ts'o <tytso@mit.edu> | |
| Wed, 14 Mar 2012 02:45:25 +0000 (13 22:45 -0400) | ||
| tree | f03c1389c2902285e7e964210729bbbf2505d607 | treesnapshot (tar.gz zip) |
| parent | c254c9ec14d5c418c8f36ea7573edae2470a1dc1 | commitdiff |
jbd2: remove bh_state lock from checkpointing code
All accesses to checkpointing entries in journal_head are protected
by j_list_lock. Thus __jbd2_journal_remove_checkpoint() doesn't really
need bh_state lock.
Also the only part of journal head that the rest of checkpointing code
needs to check is jh->b_transaction which is safe to read under
j_list_lock.
So we can safely remove bh_state lock from all of checkpointing code which
makes it considerably prettier.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
All accesses to checkpointing entries in journal_head are protected
by j_list_lock. Thus __jbd2_journal_remove_checkpoint() doesn't really
need bh_state lock.
Also the only part of journal head that the rest of checkpointing code
needs to check is jh->b_transaction which is safe to read under
j_list_lock.
So we can safely remove bh_state lock from all of checkpointing code which
makes it considerably prettier.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| fs/jbd2/checkpoint.c | diffblobblamehistory | |
| include/linux/journal-head.h | diffblobblamehistory |