--- zzzz-none-000/linux-3.10.107/arch/arm/mm/idmap.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/arm/mm/idmap.c	2021-02-04 17:41:59.000000000 +0000
@@ -9,7 +9,13 @@
 #include <asm/sections.h>
 #include <asm/system_info.h>
 
+/*
+ * Note: accesses outside of the kernel image and the identity map area
+ * are not supported on any CPU using the idmap tables as its current
+ * page tables.
+ */
 pgd_t *idmap_pgd;
+phys_addr_t (*arch_virt_to_idmap) (unsigned long x);
 
 #ifdef CONFIG_ARM_LPAE
 static void idmap_add_pmd(pud_t *pud, unsigned long addr, unsigned long end,
@@ -21,7 +27,7 @@
 	if (pud_none_or_clear_bad(pud) || (pud_val(*pud) & L_PGD_SWAPPER)) {
 		pmd = pmd_alloc_one(&init_mm, addr);
 		if (!pmd) {
-			pr_warning("Failed to allocate identity pmd.\n");
+			pr_warn("Failed to allocate identity pmd.\n");
 			return;
 		}
 		/*
@@ -74,8 +80,9 @@
 	unsigned long addr, end;
 	unsigned long next;
 
-	addr = virt_to_phys(text_start);
-	end = virt_to_phys(text_end);
+	addr = virt_to_idmap(text_start);
+	end = virt_to_idmap(text_end);
+	pr_info("Setting up static identity map for 0x%lx - 0x%lx\n", addr, end);
 
 	prot |= PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AF;
 
@@ -97,8 +104,6 @@
 	if (!idmap_pgd)
 		return -ENOMEM;
 
-	pr_info("Setting up static identity map for 0x%p - 0x%p\n",
-		__idmap_text_start, __idmap_text_end);
 	identity_mapping_add(idmap_pgd, __idmap_text_start,
 			     __idmap_text_end, 0);