[PATCH 3/3] jbd2: add __init annotation for jbd2_journal_init_journal_head_cache()

[Chengguang Xu]

jbd2_journal_init_journal_head_cache() only be called once,
so add __init annotation for it and do some code cleanup.

Signed-off-by: Chengguang Xu <cgxu...@gmail.com>
---
 fs/jbd2/journal.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 49797854ccb8..43399ad423d0 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -2371,22 +2371,19 @@ static struct kmem_cache *jbd2_journal_head_cache;
 static atomic_t nr_journal_heads = ATOMIC_INIT(0);
 #endif
 
-static int jbd2_journal_init_journal_head_cache(void)
+static int __init jbd2_journal_init_journal_head_cache(void)
 {
-       int retval;
-
        J_ASSERT(jbd2_journal_head_cache == NULL);
        jbd2_journal_head_cache = kmem_cache_create("jbd2_journal_head",
                                sizeof(struct journal_head),
                                0,              /* offset */
                                SLAB_TEMPORARY | SLAB_TYPESAFE_BY_RCU,
                                NULL);          /* ctor */
-       retval = 0;
        if (!jbd2_journal_head_cache) {
-               retval = -ENOMEM;
                printk(KERN_EMERG "JBD2: no memory for journal_head cache\n");
+               return -ENOMEM;
        }
-       return retval;
+       return 0;
 }
 
 static void jbd2_journal_destroy_journal_head_cache(void)
-- 
2.20.1