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authorMartin K. Petersen <martin.petersen@oracle.com>2015-10-21 20:19:38 +0300
committerJens Axboe <axboe@fb.com>2015-10-21 23:42:39 +0300
commita48f041d91bf1aee599fa2adb53b780ed20c2ee5 (patch)
treec1cb66965f987d782c5c6bc63826d2250caf8d18 /block/bio-integrity.c
parent0f8087ecdeac921fc4920f1328f55c15080bc6aa (diff)
downloadlinux-a48f041d91bf1aee599fa2adb53b780ed20c2ee5.tar.xz
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 'block/bio-integrity.c')
-rw-r--r--block/bio-integrity.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index a10ffe19a8dd..6a90eca9cea1 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -202,7 +202,7 @@ EXPORT_SYMBOL(bio_integrity_enabled);
static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
unsigned int sectors)
{
- return sectors >> (ilog2(bi->interval) - 9);
+ return sectors >> (bi->interval_exp - 9);
}
static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
@@ -229,7 +229,7 @@ static int bio_integrity_process(struct bio *bio,
bip->bip_vec->bv_offset;
iter.disk_name = bio->bi_bdev->bd_disk->disk_name;
- iter.interval = bi->interval;
+ iter.interval = 1 << bi->interval_exp;
iter.seed = bip_get_seed(bip);
iter.prot_buf = prot_buf;