[PATCH -next] block: Revert "block: increase BLKCG_MAX_POLS"

[Yu Kuai]

From: Yu Kuai <yukuai3@xxxxxxxxxx>

This reverts commit ec645dc96699ea6c37b6de86c84d7288ea9a4ddf.

This can save some memory, because after commit 0f7839955114 ("Revert
"block/mq-deadline: Add cgroup support""), there are total 5 policies.

Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
 include/linux/blkdev.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 41a41561b773..c6861c7fdad9 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -54,7 +54,7 @@ extern struct class block_class;
  * Maximum number of blkcg policies allowed to be registered concurrently.
  * Defined here to simplify include dependency.
  */
-#define BLKCG_MAX_POLS		6
+#define BLKCG_MAX_POLS		5
 
 #define DISK_MAX_PARTS			256
 #define DISK_NAME_LEN			32
-- 
2.31.1