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jbd2: Move dropping of jh reference out of un/re-filing functions

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__jbd2_journal_unfile_buffer() and __jbd2_journal_refile_buffer() drop
transaction's jh reference when they remove jh from a transaction. This
will be however inconvenient once we move state lock into journal_head
itself as we still need to unlock it and we'd need to grab jh reference
just for that. Move dropping of jh reference out of these functions into
the few callers.

Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20190809124233.13277-4-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Jan Kara
2019-08-09 14:42:29 +02:00
committed by Theodore Ts'o
parent d8ede917f5
commit 93108ebb84
3 changed files with 20 additions and 10 deletions
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5
fs/jbd2/commit.c
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@@ -918,6 +918,7 @@ restart_loop:
transaction_t *cp_transaction;
struct buffer_head *bh;
int try_to_free = 0;
bool drop_ref;
jh = commit_transaction->t_forget;
spin_unlock(&journal->j_list_lock);
@@ -1022,8 +1023,10 @@ restart_loop:
try_to_free = 1;
}
JBUFFER_TRACE(jh, "refile or unfile buffer");
__jbd2_journal_refile_buffer(jh);
drop_ref = __jbd2_journal_refile_buffer(jh);
jbd_unlock_bh_state(bh);
if (drop_ref)
jbd2_journal_put_journal_head(jh);
if (try_to_free)
release_buffer_page(bh); /* Drops bh reference */
else