init: fix possible format string bug

Use constant format string in case message changes.
Signed-off-by: NTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

init/initramfs.c

@@ -583,7 +583,7 @@ static int __init populate_rootfs(void)
 {
 	char *err = unpack_to_rootfs(__initramfs_start, __initramfs_size);
 	if (err)
-		panic(err);	/* Failed to decompress INTERNAL initramfs */
+		panic("%s", err); /* Failed to decompress INTERNAL initramfs */
 	if (initrd_start) {
 #ifdef CONFIG_BLK_DEV_RAM
 		int fd;

init/main.c

@@ -278,7 +278,7 @@ static int __init unknown_bootoption(char *param, char *val, const char *unused)
 		unsigned int i;
 		for (i = 0; envp_init[i]; i++) {
 			if (i == MAX_INIT_ENVS) {
-				panic_later = "Too many boot env vars at `%s'";
+				panic_later = "env";
 				panic_param = param;
 			}
 			if (!strncmp(param, envp_init[i], val - param))
@@ -290,7 +290,7 @@ static int __init unknown_bootoption(char *param, char *val, const char *unused)
 		unsigned int i;
 		for (i = 0; argv_init[i]; i++) {
 			if (i == MAX_INIT_ARGS) {
-				panic_later = "Too many boot init vars at `%s'";
+				panic_later = "init";
 				panic_param = param;
 			}
 		}
@@ -582,7 +582,8 @@ asmlinkage void __init start_kernel(void)
 	 */
 	console_init();
 	if (panic_later)
-		panic(panic_later, panic_param);
+		panic("Too many boot %s vars at `%s'", panic_later,
+		      panic_param);
 
 	lockdep_info();