diff options
| author |   Bart Van Assche <bvanassche@acm.org> | 2022-04-19 15:58:03 -0700 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2022-04-25 23:23:03 -0400 |
| commit | 3fb20fcd93fe5a1580355f1ea73f6daed1712f06 (patch) | |
| tree | 2392adf19b7f2740688d7152b69dc8cf52ab83cb /tools/perf/scripts/python | |
| parent | scsi: ufs: Remove the TRUE and FALSE definitions (diff) | |
scsi: ufs: Remove locking from around single register writes
Single register writes are atomic and hence do not need to be surrounded by
locking. Additionally, MMIO writes are typically posted asynchronously.
Hence, there is no guarantee that these have finished by the time the
spin_unlock*() call has finished. See also the nonposted-mmio property of
the Open Firmware tree. See also pci_iomap().
Link: https://lore.kernel.org/r/20220419225811.4127248-21-bvanassche@acm.org
Tested-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions