[PATCH 3.4 048/146] megaraid_sas: use raw_smp_processor_id()

lizf
2015-09-15T09:08:05Z

From: Christoph Hellwig <hch@infradead.org>

3.4.109-rc1 review patch. If anyone has any objections, please let me know.

------------------

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@lst.de>
Reported-by: Andy Lutomirski <luto@kernel.org>
Tested-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
[lizf: Backported to 3.4: drop the changes to megasas_build_dcdb_fusion()]
Signed-off-by: Zefan Li <lizefan@huawei.com>
---
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 bfd87fa..3e0f71c 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -1426,11 +1426,11 @@ 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,
--
1.9.1