From a2acfb75792511a35586db80a38b8e4701a97730 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Tue, 2 Dec 2008 18:28:53 +0100 Subject: [PATCH] AMD IOMMU: add domain id free function Impact: add code to release a domain id Signed-off-by: Joerg Roedel --- arch/x86/kernel/amd_iommu.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 8a0fd3d..0922d5f 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -571,6 +571,18 @@ static u16 domain_id_alloc(void) return id; } +#ifdef CONFIG_IOMMU_API +static void domain_id_free(int id) +{ + unsigned long flags; + + write_lock_irqsave(&amd_iommu_devtable_lock, flags); + if (id > 0 && id < MAX_DOMAIN_ID) + __clear_bit(id, amd_iommu_pd_alloc_bitmap); + write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); +} +#endif + /* * Used to reserve address ranges in the aperture (e.g. for exclusion * ranges. -- 2.7.4