svm: Export symbols for svm module

ascend inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4UR5Y
CVE: NA

--------------------

Export symbols for svm module.
Signed-off-by: NLijun Fang <fanglijun3@huawei.com>
Reviewed-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NYongqiang Liu <liuyongqiang13@huawei.com>

arch/arm64/mm/context.c

@@ -310,6 +310,7 @@ unsigned long mm_context_get(struct mm_struct *mm)
 
 	return asid;
 }
+EXPORT_SYMBOL_GPL(mm_context_get);
 
 void mm_context_put(struct mm_struct *mm)
 {
@@ -325,6 +326,7 @@ void mm_context_put(struct mm_struct *mm)
 
 	raw_spin_unlock_irqrestore(&cpu_asid_lock, flags);
 }
+EXPORT_SYMBOL_GPL(mm_context_put);
 
 /* Errata workaround post TTBRx_EL1 update. */
 asmlinkage void post_ttbr_update_workaround(void)

drivers/iommu/iommu.c

@@ -2287,6 +2287,7 @@ int iommu_request_dm_for_dev(struct device *dev)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(iommu_request_dm_for_dev);
 
 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
 {

mm/share_pool.c

@@ -91,6 +91,7 @@ static int __read_mostly enable_share_k2u_spg = 1;
 int sysctl_ac_mode = AC_NONE;
 /* debug mode */
 int sysctl_sp_debug_mode;
+EXPORT_SYMBOL(sysctl_sp_debug_mode);
 
 int sysctl_share_pool_map_lock_enable;