nilfs2: clean up nilfs_write_super

Separate conditions that check if syncing super block and alternative
super block are required as inline functions to reuse the conditions.

Signed-off-by: Jiro SEKIBA <jir@unicus.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

2 files changed, 17 insertions, 8 deletions

diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 9926a1d6d225..70e8613a1954 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -367,17 +367,12 @@ static void nilfs_write_super(struct super_block *sb)
 
         down_write(&nilfs->ns_sem);
         if (!(sb->s_flags & MS_RDONLY)) {
-                struct nilfs_super_block **sbp = nilfs->ns_sbp;
-                u64 t = get_seconds();
-                int dupsb;
-
-                if (!nilfs_discontinued(nilfs) && t >= nilfs->ns_sbwtime[0] &&
-                    t < nilfs->ns_sbwtime[0] + NILFS_SB_FREQ) {
+                if (!nilfs_discontinued(nilfs) &&
+                    !nilfs_sb_need_update(nilfs)) {
                         up_write(&nilfs->ns_sem);
                         return;
                 }
-                dupsb = sbp[1] && t > nilfs->ns_sbwtime[1] + NILFS_ALTSB_FREQ;
-                nilfs_commit_super(sbi, dupsb);
+                nilfs_commit_super(sbi, nilfs_altsb_need_update(nilfs));
         }
         sb->s_dirt = 0;
         up_write(&nilfs->ns_sem);
diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h
index fa3a1dfe4053..68e9626e3d44 100644
--- a/fs/nilfs2/the_nilfs.h
+++ b/fs/nilfs2/the_nilfs.h
@@ -200,6 +200,20 @@ THE_NILFS_FNS(DISCONTINUED, discontinued)
 #define NILFS_SB_FREQ           10
 #define NILFS_ALTSB_FREQ        60  /* spare superblock */
 
+static inline int nilfs_sb_need_update(struct the_nilfs *nilfs)
+{
+        u64 t = get_seconds();
+        return t < nilfs->ns_sbwtime[0] ||
+                 t > nilfs->ns_sbwtime[0] + NILFS_SB_FREQ;
+}
+
+static inline int nilfs_altsb_need_update(struct the_nilfs *nilfs)
+{
+        u64 t = get_seconds();
+        struct nilfs_super_block **sbp = nilfs->ns_sbp;
+        return sbp[1] && t > nilfs->ns_sbwtime[1] + NILFS_ALTSB_FREQ;
+}
+
 void nilfs_set_last_segment(struct the_nilfs *, sector_t, u64, __u64);
 struct the_nilfs *find_or_create_nilfs(struct block_device *);
 void put_nilfs(struct the_nilfs *);