From a48f041d91bf1aee599fa2adb53b780ed20c2ee5 Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Wed, 21 Oct 2015 13:19:38 -0400 Subject: block: Reduce the size of struct blk_integrity The per-device properties in the blk_integrity structure were previously unsigned short. However, most of the values fit inside a char. The only exception is the data interval size and we can work around that by storing it as a power of two. This cuts the size of the dynamic portion of blk_integrity in half. Signed-off-by: Martin K. Petersen Reported-by: Christoph Hellwig Reviewed-by: Sagi Grimberg Signed-off-by: Dan Williams Signed-off-by: Jens Axboe --- include/linux/blkdev.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'include/linux') diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index f36c6476f1c7..4f1968f15e30 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1470,10 +1470,10 @@ struct blk_integrity_profile { struct blk_integrity { struct blk_integrity_profile *profile; - unsigned short flags; - unsigned short tuple_size; - unsigned short interval; - unsigned short tag_size; + unsigned char flags; + unsigned char tuple_size; + unsigned char interval_exp; + unsigned char tag_size; }; extern bool blk_integrity_is_initialized(struct gendisk *); -- cgit v1.2.3