ANDROID: mm: Export several symbols

Exports several symbols which are used in the vendor ko.

mte_sync_tags - It is used by the macro set_pte_at.

mthp_stats - It is used by mod_mthp_stat().

swapper_spaces - It is used by macro swap_address_space.

swap_migration_ad_supported - It is used by
make_migration_entry_young().

__mmu_notifier_invalidate_range_start
__mmu_notifier_arch_invalidate_secondary_tlbs
__mmu_notifier_invalidate_range_end - These three functions are used in
vendors ko to invalidate and refresh the tlb.

Bug: 431672372
Change-Id: I5f61af22ed9c11cd5c5a79eaa49a62c5153693b9
Signed-off-by: Pengfei Li <pengfei.kernel@vivo.corp-partner.google.com>

arch/arm64/kernel/mte.c

@@ -51,6 +51,7 @@ void mte_sync_tags(pte_t pte, unsigned int nr_pages)
 	/* ensure the tags are visible before the PTE is set */
 	smp_wmb();
 }
+EXPORT_SYMBOL_GPL(mte_sync_tags);
 
 int memcmp_pages(struct page *page1, struct page *page2)
 {

mm/huge_memory.c

@@ -576,6 +576,7 @@ static const struct kobj_type thpsize_ktype = {
 };
 
 DEFINE_PER_CPU(struct mthp_stat, mthp_stats) = {{{0}}};
+EXPORT_SYMBOL_GPL(mthp_stats);
 
 static unsigned long sum_mthp_stat(int order, enum mthp_stat_item item)
 {

mm/mmu_notifier.c

@@ -533,6 +533,7 @@ int __mmu_notifier_invalidate_range_start(struct mmu_notifier_range *range)
 		return mn_hlist_invalidate_range_start(subscriptions, range);
 	return 0;
 }
+EXPORT_SYMBOL_GPL(__mmu_notifier_invalidate_range_start);
 
 static void
 mn_hlist_invalidate_end(struct mmu_notifier_subscriptions *subscriptions,
@@ -569,6 +570,7 @@ void __mmu_notifier_invalidate_range_end(struct mmu_notifier_range *range)
 		mn_hlist_invalidate_end(subscriptions, range);
 	lock_map_release(&__mmu_notifier_invalidate_range_start_map);
 }
+EXPORT_SYMBOL_GPL(__mmu_notifier_invalidate_range_end);
 
 void __mmu_notifier_arch_invalidate_secondary_tlbs(struct mm_struct *mm,
 					unsigned long start, unsigned long end)
@@ -587,6 +589,7 @@ void __mmu_notifier_arch_invalidate_secondary_tlbs(struct mm_struct *mm,
 	}
 	srcu_read_unlock(&srcu, id);
 }
+EXPORT_SYMBOL_GPL(__mmu_notifier_arch_invalidate_secondary_tlbs);
 
 /*
  * Same as mmu_notifier_register but here the caller must hold the mmap_lock in

mm/swap_state.c

@@ -39,6 +39,7 @@ static const struct address_space_operations swap_aops = {
 };
 
 struct address_space *swapper_spaces[MAX_SWAPFILES] __read_mostly;
+EXPORT_SYMBOL_GPL(swapper_spaces);
 static unsigned int nr_swapper_spaces[MAX_SWAPFILES] __read_mostly;
 static bool enable_vma_readahead __read_mostly = true;
 

mm/swapfile.c

@@ -81,6 +81,7 @@ static int least_priority = -1;
 unsigned long swapfile_maximum_size;
 #ifdef CONFIG_MIGRATION
 bool swap_migration_ad_supported;
+EXPORT_SYMBOL_GPL(swap_migration_ad_supported);
 #endif	/* CONFIG_MIGRATION */
 
 static const char Bad_file[] = "Bad swap file entry ";