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AMD IOMMU: add domain id free function

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Impact: add code to release a domain id

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2008-12-02 18:28:53 +01:00
parent 86db2e5d47
commit a2acfb7579
1 changed files with 12 additions and 0 deletions
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12
arch/x86/kernel/amd_iommu.c
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@ -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.