Attempt to fix kernel OOPS (#3358)

patch/kernel/archive/sunxi-5.10/0001-Revert-arm-ioremap-don-t-abuse-pfn_valid-to-check-if.patch

@@ -0,0 +1,36 @@
+From a5c446a989bbb4d6efd493f11e09ec3a3560887f Mon Sep 17 00:00:00 2001
+From: Igor Pecovnik <igor.pecovnik@gmail.com>
+Date: Sat, 18 Dec 2021 13:39:36 +0100
+Subject: [PATCH] Revert "arm: ioremap: don't abuse pfn_valid() to check if pfn
+ is in RAM"
+
+This reverts commit 8dd559d53b3b2de960ca1ec1359f5a9b4a12e181.
+---
+ arch/arm/mm/ioremap.c | 4 +---
+ 1 file changed, 1 insertion(+), 3 deletions(-)
+
+diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
+index 80fb5a4a5c05..000e8210000b 100644
+--- a/arch/arm/mm/ioremap.c
++++ b/arch/arm/mm/ioremap.c
+@@ -27,7 +27,6 @@
+ #include <linux/vmalloc.h>
+ #include <linux/io.h>
+ #include <linux/sizes.h>
+-#include <linux/memblock.h>
+ 
+ #include <asm/cp15.h>
+ #include <asm/cputype.h>
+@@ -285,8 +284,7 @@ static void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn,
+ 	 * Don't allow RAM to be mapped with mismatched attributes - this
+ 	 * causes problems with ARMv6+
+ 	 */
+-	if (WARN_ON(memblock_is_map_memory(PFN_PHYS(pfn)) &&
+-		    mtype != MT_MEMORY_RW))
++	if (WARN_ON(pfn_valid(pfn) && mtype != MT_MEMORY_RW))
+ 		return NULL;
+ 
+ 	area = get_vm_area_caller(size, VM_IOREMAP, caller);
+-- 
+2.25.1
+