generic compat_sys_rt_sigpending()

conditional on GENERIC_COMPAT_RT_SIGPENDING; by the end of that series
it will become the same thing as COMPAT and conditional will die out.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/linux/compat.h b/include/linux/compat.h
index 9d3c2a9..75548a4 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -598,6 +598,10 @@
 					  compat_sigset_t __user *oset,
 					  compat_size_t sigsetsize);
 #endif
+#ifdef CONFIG_GENERIC_COMPAT_RT_SIGPENDING
+asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
+					 compat_size_t sigsetsize);
+#endif
 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
 				 unsigned long arg);