Tag unreachable places as such. I left the while (1); in place since

in this context we want to busy wait to stop.

Suggested by: pfg@

stand/i386/gptboot/gptboot.c

@@ -365,6 +365,7 @@ void
 exit(int x)
 {
 	while (1);
+	__unreachable();
 }
 
 static void

stand/mips/beri/loader/main.c

@@ -193,6 +193,7 @@ abort(void)
 
 	printf("error: loader abort\n");
 	while (1);
+	__unreachable();
 }
 
 void
@@ -201,6 +202,7 @@ exit(int code)
 
 	printf("error: loader exit\n");
 	while (1);
+	__unreachable();
 }
 
 void
@@ -209,6 +211,7 @@ longjmperror(void)
 
 	printf("error: loader longjmp error\n");
 	while (1);
+	__unreachable();
 }
 
 time_t

stand/mips/uboot/conf.c

@@ -105,6 +105,7 @@ abort(void)
  
 	printf("error: loader abort\n");
 	while (1);
+	__unreachable();
 }
 
 void
@@ -113,6 +114,7 @@ longjmperror(void)
  
 	printf("error: loader longjmp error\n");
 	while (1);
+	__unreachable();
 }
 
 int debug = 1;

stand/powerpc/kboot/main.c

@@ -131,6 +131,7 @@ void
 exit(int code)
 {
 	while (1); /* XXX: host_exit */
+	__unreachable();
 }
 
 void

stand/uboot/common/main.c

@@ -526,7 +526,8 @@ command_reboot(int argc, char *argv[])
 	ub_reset();
 
 	printf("Reset failed!\n");
-	while(1);
+	while (1);
+	__unreachable();
 }
 
 COMMAND_SET(devinfo, "devinfo", "show U-Boot devices", command_devinfo);

stand/uboot/lib/glue.c

@@ -187,7 +187,8 @@ ub_reset(void)
 {
 
 	syscall(API_RESET, NULL);
-	while (1);		/* Can't tag syscall as __dead2 */
+	while (1);	/* fallback if API_RESET failed */
+	__unreachable();
 }
 
 static struct mem_region mr[UB_MAX_MR];