kernel_change.txt

What follows is a `git diff` of the linux source code.
In order to permit/ease the creation of an LKM rootkit, this symbol had
its `static` keyword removed and was instead marked for export.

diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 8e934bb44..18e6ef308 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -423,7 +423,7 @@ void __init create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys,
 			     pgd_pgtable_alloc, flags);
 }
 
-static void update_mapping_prot(phys_addr_t phys, unsigned long virt,
+void update_mapping_prot(phys_addr_t phys, unsigned long virt,
 				phys_addr_t size, pgprot_t prot)
 {
 	if (virt < PAGE_OFFSET) {
@@ -438,6 +438,7 @@ static void update_mapping_prot(phys_addr_t phys, unsigned long virt,
 	/* flush the TLBs after updating live kernel mappings */
 	flush_tlb_kernel_range(virt, virt + size);
 }
+EXPORT_SYMBOL(update_mapping_prot);
 
 static void __init __map_memblock(pgd_t *pgdp, phys_addr_t start,
 				  phys_addr_t end, pgprot_t prot, int flags)