From 6eadc61224666dcc79763dc21749b5f809d82140 Mon Sep 17 00:00:00 2001 From: Damien Le Moal Date: Mon, 24 Apr 2017 16:51:10 +0900 Subject: 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 Reviewed-by: Christoph Hellwig Signed-off-by: Martin K. Petersen --- drivers/scsi/sd.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/scsi/sd.h') 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); -- cgit v1.2.3-59-g8ed1b