f2fs: let's avoid to get cp_rwsem twice by f2fs_evict_inode by d_invalidate

f2fs_unlink
 -> f2fs_lock_op
 -> d_invalidate
  -> shrink_dentry_list
   -> iput_final
    -> f2fs_evict_inode
     -> f2fs_lock_op

Reviewed-by: Chao Yu <chao@kernel.org>
Tested-by: Yangtao Li <frank.li@vivo.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index a389772..e104409 100644 (file)
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -632,6 +632,8 @@ static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
                goto fail;
        }
        f2fs_delete_entry(de, page, dir, inode);
+       f2fs_unlock_op(sbi);
+
 #if IS_ENABLED(CONFIG_UNICODE)
        /* VFS negative dentries are incompatible with Encoding and
         * Case-insensitiveness. Eventually we'll want avoid
@@ -642,8 +644,6 @@ static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
        if (IS_CASEFOLDED(dir))
                d_invalidate(dentry);
 #endif
-       f2fs_unlock_op(sbi);
-
        if (IS_DIRSYNC(dir))
                f2fs_sync_fs(sbi->sb, 1);
 fail: