Updated to 2.5.52. A couple of changes relating to system call

restarting.

arch/um/kernel/signal_kern.c

@@ -16,6 +16,7 @@
 #include "linux/binfmts.h"
 #include "asm/signal.h"
 #include "asm/uaccess.h"
+#include "asm/unistd.h"
 #include "user_util.h"
 #include "kern_util.h"
 #include "signal_kern.h"

arch/um/kernel/sys_call_table.c

@@ -13,6 +13,7 @@
 #include "sysdep/syscalls.h"
 #include "kern_util.h"
 
+extern syscall_handler_t sys_restart_syscall;
 extern syscall_handler_t sys_ni_syscall;
 extern syscall_handler_t sys_exit;
 extern syscall_handler_t sys_fork;