[PATCH 4/5] xfs: remove dead code from xfs_log_unmount_write

Christoph Hellwig
2020-03-12T14:40:13Z

When the log is shut down all iclogs are in the XLOG_STATE_IOERROR state,
which means that xlog_state_want_sync and xlog_state_release_iclog are
no-ops. Remove the whole section of code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
---
fs/xfs/xfs_log.c | 35 +++--------------------------------
1 file changed, 3 insertions(+), 32 deletions(-)

diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index fa499ddedb94..b56432d4a9b8 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -984,38 +984,9 @@ xfs_log_unmount_write(xfs_mount_t *mp)
iclog = iclog->ic_next;
} while (iclog != first_iclog);
#endif
- if (! (XLOG_FORCED_SHUTDOWN(log))) {
- xfs_log_write_unmount_record(mp);
- } else {
- /*
- * We're already in forced_shutdown mode, couldn't
- * even attempt to write out the unmount transaction.
- *
- * Go through the motions of sync'ing and releasing
- * the iclog, even though no I/O will actually happen,
- * we need to wait for other log I/Os that may already
- * be in progress. Do this as a separate section of
- * code so we'll know if we ever get stuck here that
- * we're in this odd situation of trying to unmount
- * a file system that went into forced_shutdown as
- * the result of an unmount..
- */
- spin_lock(&log->l_icloglock);
- iclog = log->l_iclog;
- atomic_inc(&iclog->ic_refcnt);
- xlog_state_want_sync(log, iclog);
- xlog_state_release_iclog(log, iclog);
- switch (iclog->ic_state) {
- case XLOG_STATE_ACTIVE:
- case XLOG_STATE_DIRTY:
- case XLOG_STATE_IOERROR:
- spin_unlock(&log->l_icloglock);
- break;
- default:
- xlog_wait(&iclog->ic_force_wait, &log->l_icloglock);
- break;
- }
- }
+ if (XLOG_FORCED_SHUTDOWN(log))
+ return;
+ xfs_log_write_unmount_record(mp);
}

/*
--
2.24.1