[PATCH 3.16.y-ckt 080/130] megaraid_sas: use raw_smp_processor_id()

From: Luis Henriques
Date: Fri Sep 04 2015 - 09:33:31 EST

3.16.7-ckt17 -stable review patch. If anyone has any objections, please let me know.


From: Christoph Hellwig <hch@xxxxxxxxxxxxx>

commit 16b8528d20607925899b1df93bfd8fbab98d267c upstream.

We only want to steer the I/O completion towards a queue, but don't
actually access any per-CPU data, so the raw_ version is fine to use
and avoids the warnings when using smp_processor_id().

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reported-by: Andy Lutomirski <luto@xxxxxxxxxx>
Tested-by: Andy Lutomirski <luto@xxxxxxxxxx>
Acked-by: Sumit Saxena <sumit.saxena@xxxxxxxxxxxxx>
Signed-off-by: James Bottomley <JBottomley@xxxxxxxx>
[ luis: backported to 3.16:
- dropped changes to megasas_build_dcdb_fusion() ]
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
drivers/scsi/megaraid/megaraid_sas_fusion.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index 9872ccb28f1f..f16764bf9964 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -1500,11 +1500,11 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
fp_possible = io_info.fpOkForIo;

- /* Use smp_processor_id() for now until cmd->request->cpu is CPU
+ /* Use raw_smp_processor_id() for now until cmd->request->cpu is CPU
id by default, not CPU group id, otherwise all MSI-X queues won't
be utilized */
cmd->request_desc->SCSIIO.MSIxIndex = instance->msix_vectors ?
- smp_processor_id() % instance->msix_vectors : 0;
+ raw_smp_processor_id() % instance->msix_vectors : 0;

if (fp_possible) {
megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
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