f2fs: make locate_dirty_segment() as static

It's used only locally and could be static.

Signed-off-by: Haicheng Li <haicheng.li@linux.intel.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index a05aa65..3e7cb33 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -996,7 +996,6 @@
  */
 void f2fs_balance_fs(struct f2fs_sb_info *);
 void invalidate_blocks(struct f2fs_sb_info *, block_t);
-void locate_dirty_segment(struct f2fs_sb_info *, unsigned int);
 void clear_prefree_segments(struct f2fs_sb_info *);
 int npages_for_summary_flush(struct f2fs_sb_info *);
 void allocate_new_segments(struct f2fs_sb_info *);
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 77f31c0..b15debc 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -94,7 +94,7 @@
  * Adding dirty entry into seglist is not critical operation.
  * If a given segment is one of current working segments, it won't be added.
  */
-void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
+static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
 {
 	struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
 	unsigned short valid_blocks;