Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/init.h b/include/linux/init.h
index 2538d17..212fc9e 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -133,11 +133,12 @@
 #endif
 
 extern initcall_entry_t __con_initcall_start[], __con_initcall_end[];
-extern initcall_entry_t __security_initcall_start[], __security_initcall_end[];
 
 /* Used for contructor calls. */
 typedef void (*ctor_fn_t)(void);
 
+struct file_system_type;
+
 /* Defined in init/main.c */
 extern int do_one_initcall(initcall_t fn);
 extern char __initdata boot_command_line[];
@@ -147,8 +148,8 @@
 /* used by init/main.c */
 void setup_arch(char **);
 void prepare_namespace(void);
-void __init load_default_modules(void);
-int __init init_rootfs(void);
+void __init init_rootfs(void);
+extern struct file_system_type rootfs_fs_type;
 
 #if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_STRICT_MODULE_RWX)
 extern bool rodata_enabled;
@@ -236,7 +237,6 @@
 	static exitcall_t __exitcall_##fn __exit_call = fn
 
 #define console_initcall(fn)	___define_initcall(fn,, .con_initcall)
-#define security_initcall(fn)	___define_initcall(fn,, .security_initcall)
 
 struct obs_kernel_param {
 	const char *str;