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authorDamien Le Moal <damien.lemoal@wdc.com>2017-04-24 16:51:10 +0900
committerMartin K. Petersen <martin.petersen@oracle.com>2017-04-24 19:00:29 -0400
commit6eadc61224666dcc79763dc21749b5f809d82140 (patch)
treeb14107bc46373d10b1727c2b0f348de0b5ad7e50 /drivers/scsi/sd.h
parent7529fbb0080d67bc45a3cdad91574cdd0f8a31cf (diff)
scsi: sd: Improve sd_completed_bytes
Re-shuffle the code to be more efficient by not initializing variables upfront (i.e. do it only when necessary). Also replace the do_div calls with calls to sectors_to_logical(). No functional change is introduced by this patch. [mkp: bytes_to_logical()] Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/sd.h')
-rw-r--r--drivers/scsi/sd.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h
index 0cf9680cb469..e6241c445878 100644
--- a/drivers/scsi/sd.h
+++ b/drivers/scsi/sd.h
@@ -169,6 +169,11 @@ static inline unsigned int logical_to_bytes(struct scsi_device *sdev, sector_t b
return blocks * sdev->sector_size;
}
+static inline sector_t bytes_to_logical(struct scsi_device *sdev, unsigned int bytes)
+{
+ return bytes >> ilog2(sdev->sector_size);
+}
+
static inline sector_t sectors_to_logical(struct scsi_device *sdev, sector_t sector)
{
return sector >> (ilog2(sdev->sector_size) - 9);