diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2015-11-20 16:38:28 (GMT) |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2015-11-26 03:17:02 (GMT) |
| commit | 494131124f04252bb3f91c0801bfe796d49971ef (patch) | |
| tree | 92cbf3a0415f542f6938988e6512f9fbaaead5e3 | |
| parent | 8c77dca011125b795bfa1c86f85a80132feee578 (diff) | |
| download | linux-494131124f04252bb3f91c0801bfe796d49971ef.tar.xz | |
scsi: use sector_div instead of do_div
do_div is the wrong way to divide a sector_t, as it is less efficient
when sector_t is 32-bit wide. With the upcoming do_div optimizations,
the kernel starts warning about this:
drivers/scsi/scsi_debug.c: In function 'dif_store':
include/asm-generic/div64.h:207:28: warning: comparison of distinct pointer types lacks a cast
This changes the code to use sector_div instead, which always produces
optimal code.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinicke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/scsi_debug.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index dfcc45b..ec622ba 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -678,7 +678,7 @@ static void *fake_store(unsigned long long lba) static struct sd_dif_tuple *dif_store(sector_t sector) { - sector = do_div(sector, sdebug_store_sectors); + sector = sector_div(sector, sdebug_store_sectors); return dif_storep + sector; } @@ -2780,7 +2780,7 @@ static unsigned long lba_to_map_index(sector_t lba) lba += scsi_debug_unmap_granularity - scsi_debug_unmap_alignment; } - do_div(lba, scsi_debug_unmap_granularity); + sector_div(lba, scsi_debug_unmap_granularity); return lba; } |