linux-kernel - [PATCH -next] block: Revert "block: increase BLKCG_MAX

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Message-Id: <20230203081357.1385168-1-yukuai1@huaweicloud.com>
Date:   Fri,  3 Feb 2023 16:13:57 +0800
From:   Yu Kuai <yukuai1@...weicloud.com>
To:     tj@...nel.org, oleksandr@...alenko.name, axboe@...nel.dk
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        yukuai3@...wei.com, yukuai1@...weicloud.com, yi.zhang@...wei.com,
        yangerkun@...wei.com
Subject: [PATCH -next] block: Revert "block: increase BLKCG_MAX_POLS"

From: Yu Kuai <yukuai3@...wei.com>

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@...wei.com>
---
 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