@@ -391,7 +391,7 @@ struct arm_smmu_domain {
struct arm_smmu_cfg root_cfg;
phys_addr_t output_mask;
- struct mutex lock;
+ spinlock_t lock;
};
static DEFINE_SPINLOCK(arm_smmu_devices_lock);
@@ -884,7 +884,7 @@ static int arm_smmu_domain_init(struct iommu_domain *domain)
goto out_free_domain;
smmu_domain->root_cfg.pgd = pgd;
- mutex_init(&smmu_domain->lock);
+ spin_lock_init(&smmu_domain->lock);
domain->priv = smmu_domain;
return 0;
@@ -1116,7 +1116,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
* Sanity check the domain. We don't currently support domains
* that cross between different SMMU chains.
*/
- mutex_lock(&smmu_domain->lock);
+ spin_lock(&smmu_domain->lock);
if (!smmu_domain->leaf_smmu) {
/* Now that we have a master, we can finalise the domain */
ret = arm_smmu_init_domain_context(domain, dev);
@@ -1131,7 +1131,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
dev_name(device_smmu->dev));
goto err_unlock;
}
- mutex_unlock(&smmu_domain->lock);
+ spin_unlock(&smmu_domain->lock);
/* Looks ok, so add the device to the domain */
master = find_smmu_master(smmu_domain->leaf_smmu, dev->of_node);
@@ -1141,7 +1141,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
return arm_smmu_domain_add_master(smmu_domain, master);
err_unlock:
- mutex_unlock(&smmu_domain->lock);
+ spin_unlock(&smmu_domain->lock);
return ret;
}
@@ -1188,7 +1188,7 @@ static int arm_smmu_alloc_init_pte(struct arm_smmu_device *smmu, pmd_t *pmd,
if (pmd_none(*pmd)) {
/* Allocate a new set of tables */
- pgtable_t table = alloc_page(PGALLOC_GFP);
+ pgtable_t table = alloc_page(GFP_ATOMIC|__GFP_ZERO);
if (!table)
return -ENOMEM;
@@ -1290,7 +1290,7 @@ static int arm_smmu_alloc_init_pmd(struct arm_smmu_device *smmu, pud_t *pud,
#ifndef __PAGETABLE_PMD_FOLDED
if (pud_none(*pud)) {
- pmd = pmd_alloc_one(NULL, addr);
+ pmd = (pmd_t *)get_zeroed_page(GFP_ATOMIC);
if (!pmd)
return -ENOMEM;
@@ -1322,7 +1322,7 @@ static int arm_smmu_alloc_init_pud(struct arm_smmu_device *smmu, pgd_t *pgd,
#ifndef __PAGETABLE_PUD_FOLDED
if (pgd_none(*pgd)) {
- pud = pud_alloc_one(NULL, addr);
+ pud = (pud_t *)get_zeroed_page(GFP_ATOMIC);
if (!pud)
return -ENOMEM;
@@ -1376,7 +1376,7 @@ static int arm_smmu_handle_mapping(struct arm_smmu_domain *smmu_domain,
if (paddr & ~output_mask)
return -ERANGE;
- mutex_lock(&smmu_domain->lock);
+ spin_lock(&smmu_domain->lock);
pgd += pgd_index(iova);
end = iova + size;
do {
@@ -1392,7 +1392,7 @@ static int arm_smmu_handle_mapping(struct arm_smmu_domain *smmu_domain,
} while (pgd++, iova != end);
out_unlock:
- mutex_unlock(&smmu_domain->lock);
+ spin_unlock(&smmu_domain->lock);
/* Ensure new page tables are visible to the hardware walker */
if (smmu->features & ARM_SMMU_FEAT_COHERENT_WALK)