On Thu, 23 Jun 2016, Arnd Bergmann wrote:
Several drivers use an expensive do_div() to compute the number of logical or physical blocks in a blockdev, which can be done more efficiently using a shift, since the blocksize is always a power of two number. Let's introduce bdev_logical_block_count() and bdev_physical_block_count() helper functions mirroring the bdev_logical_block_size() and bdev_physical_block_size() interfaces for the block size.
@@ -1226,6 +1226,13 @@ static inline unsigned short bdev_logical_block_size(struct block_device *bdev) return queue_logical_block_size(bdev_get_queue(bdev)); } +static inline sector_t bdev_logical_block_count(struct block_device *bdev)
Curious, why not just return u64 instead for all these instead of sector_t (ie dealing with lba, it reads weird)? Thanks, Davidlohr -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
