linux-ext4 - [PATCH 1/4] block: Increase count of supported write-hints

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Message-id: <1547047861-7271-2-git-send-email-joshi.k@samsung.com>
Date:   Wed, 09 Jan 2019 21:00:58 +0530
From:   Kanchan Joshi <joshi.k@...sung.com>
To:     linux-fsdevel@...r.kernel.org
Cc:     linux-block@...r.kernel.org, linux-ext4@...r.kernel.org,
        linux-nvme@...ts.infradead.org, jack@...e.com, david@...morbit.com,
        tytso@....edu, prakash.v@...sung.com,
        Kanchan Joshi <joshi.k@...sung.com>
Subject: [PATCH 1/4] block: Increase count of supported write-hints

This patch bumps up write-hint count to support four new, in-kernel
hints.

Signed-off-by: Kanchan Joshi <joshi.k@...sung.com>
---
 include/linux/blkdev.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 338604d..df07759 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -568,7 +568,10 @@ struct request_queue {
 
 	struct work_struct	release_work;
 
-#define BLK_MAX_WRITE_HINTS	5
+#define BLK_MAX_USER_WRITE_HINTS	5
+#define BLK_MAX_KERNEL_WRITE_HINTS	4
+#define BLK_MAX_WRITE_HINTS	(BLK_MAX_USER_WRITE_HINTS + \
+				BLK_MAX_KERNEL_WRITE_HINTS)
 	u64			write_hints[BLK_MAX_WRITE_HINTS];
 };
 
-- 
2.7.4