jbd2: unexport jbd2_log_start_commit()

jbd2_log_start_commit() is not used outside of jbd2 so unexport it. Also
make __jbd2_log_start_commit() static when we are at it.
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Link: https://lore.kernel.org/r/20220608112355.4397-4-jack@suse.czSigned-off-by: Theodore Ts'o <tytso@mit.edu>

fs/jbd2/journal.c

@@ -80,7 +80,6 @@ EXPORT_SYMBOL(jbd2_journal_errno);
 EXPORT_SYMBOL(jbd2_journal_ack_err);
 EXPORT_SYMBOL(jbd2_journal_clear_err);
 EXPORT_SYMBOL(jbd2_log_wait_commit);
-EXPORT_SYMBOL(jbd2_log_start_commit);
 EXPORT_SYMBOL(jbd2_journal_start_commit);
 EXPORT_SYMBOL(jbd2_journal_force_commit_nested);
 EXPORT_SYMBOL(jbd2_journal_wipe);
@@ -479,7 +478,7 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
  * Called with j_state_lock locked for writing.
  * Returns true if a transaction commit was started.
  */
-int __jbd2_log_start_commit(journal_t *journal, tid_t target)
+static int __jbd2_log_start_commit(journal_t *journal, tid_t target)
 {
 	/* Return if the txn has already requested to be committed */
 	if (journal->j_commit_request == target)

include/linux/jbd2.h

@@ -1646,7 +1646,6 @@ extern void	jbd2_clear_buffer_revoked_flags(journal_t *journal);
  */
 
 int jbd2_log_start_commit(journal_t *journal, tid_t tid);
-int __jbd2_log_start_commit(journal_t *journal, tid_t tid);
 int jbd2_journal_start_commit(journal_t *journal, tid_t *tid);
 int jbd2_log_wait_commit(journal_t *journal, tid_t tid);
 int jbd2_transaction_committed(journal_t *journal, tid_t tid);