x86/dma: Mark iommu_pass_through as __read_mostly (ac0101d3) · Commits · 戴 / test

arch/x86/kernel/pci-dma.c

+8 −1

Original line number	Diff line number	Diff line
		@@ -32,7 +32,14 @@ int no_iommu __read_mostly;
		/* Set this to 1 if there is a HW IOMMU in the system */
		int iommu_detected __read_mostly = 0;

		int iommu_pass_through;
		/*
		* This variable becomes 1 if iommu=pt is passed on the kernel command line.
		* If this variable is 1, IOMMU implementations do no DMA ranslation for
		* devices and allow every device to access to whole physical memory. This is
		* useful if a user want to use an IOMMU only for KVM device assignment to
		* guests and not for driver dma translation.
		*/
		int iommu_pass_through __read_mostly;

		dma_addr_t bad_dma_address __read_mostly = 0;
		EXPORT_SYMBOL(bad_dma_address);