[PATCH] jbd2: fix jbd2_journal_[un]register_shrinker undefined error

[Zhang Yi <yi.zhang@huawei.com>]

Export jbd2_journal_unregister_shrinker() and
jbd2_journal_register_shrinker() to fix below error:

 ERROR: modpost: "jbd2_journal_unregister_shrinker" undefined!
 ERROR: modpost: "jbd2_journal_register_shrinker" undefined!

Fixes: 4ba3fcdde7e3 ("jbd2,ext4: add a shrinker to release checkpointed buffers")
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
---
 fs/jbd2/journal.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 7c52feb6f753..152880c298ca 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -2122,6 +2122,7 @@ int jbd2_journal_register_shrinker(journal_t *journal)
 
 	return 0;
 }
+EXPORT_SYMBOL(jbd2_journal_register_shrinker);
 
 /**
  * jbd2_journal_unregister_shrinker()
@@ -2134,6 +2135,7 @@ void jbd2_journal_unregister_shrinker(journal_t *journal)
 	percpu_counter_destroy(&journal->j_jh_shrink_count);
 	unregister_shrinker(&journal->j_shrinker);
 }
+EXPORT_SYMBOL(jbd2_journal_unregister_shrinker);
 
 /**
  * jbd2_journal_destroy() - Release a journal_t structure.
-- 
2.31.1