iommu/vt-d: 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@lca.pw>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 466129e..1b89c34 100644 (file)
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4018,7 +4018,6 @@ 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)
@@ -4029,8 +4028,6 @@ 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);