Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c
index 376f6b6..f96a585 100644
--- a/arch/s390/kernel/crash_dump.c
+++ b/arch/s390/kernel/crash_dump.c
@@ -13,10 +13,9 @@
 #include <linux/mm.h>
 #include <linux/gfp.h>
 #include <linux/slab.h>
-#include <linux/bootmem.h>
+#include <linux/memblock.h>
 #include <linux/elf.h>
 #include <asm/asm-offsets.h>
-#include <linux/memblock.h>
 #include <asm/os_info.h>
 #include <asm/elf.h>
 #include <asm/ipl.h>
@@ -61,7 +60,10 @@
 {
 	struct save_area *sa;
 
-	sa = (void *) memblock_alloc(sizeof(*sa), 8);
+	sa = (void *) memblock_phys_alloc(sizeof(*sa), 8);
+	if (!sa)
+		panic("Failed to allocate save area\n");
+
 	if (is_boot_cpu)
 		list_add(&sa->list, &dump_save_areas);
 	else