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| author |   Martin K. Petersen <martin.petersen@oracle.com> | 2015-10-21 13:19:38 -0400 |
|---|---|---|
| committer |   Jens Axboe <axboe@fb.com> | 2015-10-21 14:42:39 -0600 |
| commit | a48f041d91bf1aee599fa2adb53b780ed20c2ee5 (patch) | |
| tree | c1cb66965f987d782c5c6bc63826d2250caf8d18 /include/linux/blkdev.h | |
| parent | block: Consolidate static integrity profile properties (diff) | |
| download | linux-dev-a48f041d91bf1aee599fa2adb53b780ed20c2ee5.tar.xz linux-dev-a48f041d91bf1aee599fa2adb53b780ed20c2ee5.zip | |
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 <martin.petersen@oracle.com>
Reported-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 8 |
1 files changed, 4 insertions, 4 deletions
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 *); |