[PATCH] f2fs: enable real-time discard by default

[Chao Yu]

f2fs is focused on flash based storage, so let's enable real-time
discard by default, if user don't want to enable it, 'nodiscard'
mount option should be used on mount.

Signed-off-by: Chao Yu <yuchao0@xxxxxxxxxx>
---
 fs/f2fs/super.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 848badda50ad..980edeb0b650 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1366,12 +1366,11 @@ static void default_options(struct f2fs_sb_info *sbi)
 	set_opt(sbi, NOHEAP);
 	sbi->sb->s_flags |= SB_LAZYTIME;
 	set_opt(sbi, FLUSH_MERGE);
-	if (f2fs_sb_has_blkzoned(sbi->sb)) {
+	set_opt(sbi, DISCARD);
+	if (f2fs_sb_has_blkzoned(sbi->sb))
 		set_opt_mode(sbi, F2FS_MOUNT_LFS);
-		set_opt(sbi, DISCARD);
-	} else {
+	else
 		set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
-	}
 
 #ifdef CONFIG_F2FS_FS_XATTR
 	set_opt(sbi, XATTR_USER);
-- 
2.18.0.rc1