[PATCH] f2fs: define DEFAULT_SMALL_VOLUME_DISCARD_GRANULARITY macro

[Yangtao Li]

Do cleanup in f2fs_tuning_parameters(), let's use macro
instead of number.

Signed-off-by: Yangtao Li <frank.li@xxxxxxxx>
---
 fs/f2fs/f2fs.h  | 2 ++
 fs/f2fs/super.c | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index f0833638f59e..86c651884d26 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -329,6 +329,8 @@ struct discard_entry {
 	unsigned char discard_map[SIT_VBLOCK_MAP_SIZE];	/* segment discard bitmap */
 };
 
+/* default discard granularity for small device, unit: block count */
+#define DEFAULT_SMALL_VOLUME_DISCARD_GRANULARITY 1
 /* default discard granularity of inner discard thread, unit: block count */
 #define DEFAULT_DISCARD_GRANULARITY		16
 /* default maximum discard granularity of ordered discard, unit: block count */
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 31435c8645c8..7c32eabcf50c 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -4080,7 +4080,7 @@ static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
 	/* adjust parameters according to the volume size */
 	if (MAIN_SEGS(sbi) <= SMALL_VOLUME_SEGMENTS) {
 		if (f2fs_block_unit_discard(sbi))
-			SM_I(sbi)->dcc_info->discard_granularity = 1;
+			SM_I(sbi)->dcc_info->discard_granularity = DEFAULT_SMALL_VOLUME_DISCARD_GRANULARITY;
 		SM_I(sbi)->ipu_policy = 1 << F2FS_IPU_FORCE |
 					1 << F2FS_IPU_HONOR_OPU_WRITE;
 	}
-- 
2.25.1