Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c
index 6972d5d..1f87b52 100644
--- a/arch/openrisc/mm/init.c
+++ b/arch/openrisc/mm/init.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * OpenRISC idle.c
  *
@@ -8,11 +9,6 @@
  * Modifications for the OpenRISC architecture:
  * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
- *
- *      This program is free software; you can redistribute it and/or
- *      modify it under the terms of the GNU General Public License
- *      as published by the Free Software Foundation; either version
- *      2 of the License, or (at your option) any later version.
  */
 
 #include <linux/signal.h>
@@ -26,14 +22,12 @@
 #include <linux/mm.h>
 #include <linux/swap.h>
 #include <linux/smp.h>
-#include <linux/bootmem.h>
+#include <linux/memblock.h>
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/blkdev.h>	/* for initrd_* */
 #include <linux/pagemap.h>
-#include <linux/memblock.h>
 
-#include <asm/segment.h>
 #include <asm/pgalloc.h>
 #include <asm/pgtable.h>
 #include <asm/dma.h>
@@ -106,7 +100,10 @@
 			}
 
 			/* Alloc one page for holding PTE's... */
-			pte = (pte_t *) __va(memblock_alloc(PAGE_SIZE, PAGE_SIZE));
+			pte = memblock_alloc_raw(PAGE_SIZE, PAGE_SIZE);
+			if (!pte)
+				panic("%s: Failed to allocate page for PTEs\n",
+				      __func__);
 			set_pmd(pme, __pmd(_KERNPG_TABLE + __pa(pte)));
 
 			/* Fill the newly allocated page with PTE'S */
@@ -213,7 +210,7 @@
 	memset((void *)empty_zero_page, 0, PAGE_SIZE);
 
 	/* this will put all low memory onto the freelists */
-	free_all_bootmem();
+	memblock_free_all();
 
 	mem_init_print_info(NULL);
 
@@ -221,15 +218,3 @@
 	mem_init_done = 1;
 	return;
 }
-
-#ifdef CONFIG_BLK_DEV_INITRD
-void free_initrd_mem(unsigned long start, unsigned long end)
-{
-	free_reserved_area((void *)start, (void *)end, -1, "initrd");
-}
-#endif
-
-void free_initmem(void)
-{
-	free_initmem_default(-1);
-}