linux-kernel - [PATCH] iommu/intel: remove an unused variable "length"

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Date:   Mon, 17 Jun 2019 09:20:27 -0400
From:   Qian Cai <cai@....pw>
To:     jroedel@...e.de
Cc:     dwmw2@...radead.org, eric.auger@...hat.com,
        baolu.lu@...ux.intel.com, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, Qian Cai <cai@....pw>
Subject: [PATCH] iommu/intel: remove an unused variable "length"

The linux-next commit "iommu/vt-d: Duplicate iommu_resv_region objects
per device list" [1] left out an unused variable,

drivers/iommu/intel-iommu.c: In function 'dmar_parse_one_rmrr':
drivers/iommu/intel-iommu.c:4014:9: warning: variable 'length' set but
not used [-Wunused-but-set-variable]

[1] https://lore.kernel.org/patchwork/patch/1083073/

Signed-off-by: Qian Cai <cai@....pw>
---
 drivers/iommu/intel-iommu.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 478ac186570b..d86d4ee5cc78 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4011,7 +4011,6 @@ int __init dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg)
 {
 	struct acpi_dmar_reserved_memory *rmrr;
 	struct dmar_rmrr_unit *rmrru;
-	size_t length;
 
 	rmrru = kzalloc(sizeof(*rmrru), GFP_KERNEL);
 	if (!rmrru)
@@ -4022,8 +4021,6 @@ int __init dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg)
 	rmrru->base_address = rmrr->base_address;
 	rmrru->end_address = rmrr->end_address;
 
-	length = rmrr->end_address - rmrr->base_address + 1;
-
 	rmrru->devices = dmar_alloc_dev_scope((void *)(rmrr + 1),
 				((void *)rmrr) + rmrr->header.length,
 				&rmrru->devices_cnt);
-- 
2.20.1 (Apple Git-117)