From 4578f989ed6b77c14af86bb882cc5ff0a46a69eb Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 19 Feb 2024 19:16:01 +0800 Subject: [PATCH] iommu/vt-d: Fix constant-out-of-range warning On 32-bit builds, the vt-d driver causes a warning with clang: drivers/iommu/intel/nested.c:112:13: error: result of comparison of constant 18446744073709551615 with expression of type 'unsigned long' is always false [-Werror,-Wtautological-constant-out-of-range-compare] 112 | if (npages == U64_MAX) | ~~~~~~ ^ ~~~~~~~ Make the variable a 64-bit type, which matches both the caller and the use anyway. Fixes: f6f3721244a8 ("iommu/vt-d: Add iotlb flush for nested domain") Signed-off-by: Arnd Bergmann Link: https://lore.kernel.org/r/20240213095832.455245-1-arnd@kernel.org Signed-off-by: Lu Baolu Signed-off-by: Joerg Roedel --- drivers/iommu/intel/nested.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/intel/nested.c b/drivers/iommu/intel/nested.c index d5af5925a31c6..a7d68f3d518ac 100644 --- a/drivers/iommu/intel/nested.c +++ b/drivers/iommu/intel/nested.c @@ -103,7 +103,7 @@ static void nested_flush_dev_iotlb(struct dmar_domain *domain, u64 addr, } static void intel_nested_flush_cache(struct dmar_domain *domain, u64 addr, - unsigned long npages, bool ih) + u64 npages, bool ih) { struct iommu_domain_info *info; unsigned int mask; -- 2.30.2