AcoSail/kernel_optimize_test
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megaraid_sas: use raw_smp_processor_id()

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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>
Cc: <stable@vger.kernel.org>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
Christoph Hellwig 2015-04-15 09:44:37 -07:00 committed by James Bottomley
parent e557990e35
commit 16b8528d20
1 changed files with 6 additions and 3 deletions
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9
drivers/scsi/megaraid/megaraid_sas_fusion.c
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@ -1584,11 +1584,11 @@ 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,
@ -1693,7 +1693,10 @@ megasas_build_dcdb_fusion(struct megasas_instance *instance,
<< MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle;
cmd->request_desc->SCSIIO.MSIxIndex =
instance->msix_vectors ? smp_processor_id() % instance->msix_vectors : 0;
instance->msix_vectors ?
raw_smp_processor_id() %
instance->msix_vectors :
0;
os_timeout_value = scmd->request->timeout / HZ;
if (instance->secure_jbod_support &&