x86: unsafe_put-style macro for sigmask

regularizes things a bit
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/x86/kernel/signal.c

@@ -203,6 +203,11 @@ do {									\
 		goto label;						\
 } while(0);
 
+#define unsafe_put_sigmask(set, frame, label) \
+	unsafe_put_user(*(__u64 *)(set), \
+			(__u64 __user *)&(frame)->uc.uc_sigmask, \
+			label)
+
 /*
  * Set up a signal frame.
  */
@@ -392,8 +397,7 @@ static int __setup_rt_frame(int sig, struct ksignal *ksig,
 	 */
 	unsafe_put_user(*((u64 *)&rt_retcode), (u64 *)frame->retcode, Efault);
 	unsafe_put_sigcontext(&frame->uc.uc_mcontext, fp, regs, set, Efault);
-	unsafe_put_user(*(__u64 *)set,
-			(__u64 __user *)&frame->uc.uc_sigmask, Efault);
+	unsafe_put_sigmask(set, frame, Efault);
 	user_access_end();
 	
 	if (copy_siginfo_to_user(&frame->info, &ksig->info))
@@ -458,7 +462,7 @@ static int __setup_rt_frame(int sig, struct ksignal *ksig,
 	   already in userspace.  */
 	unsafe_put_user(ksig->ka.sa.sa_restorer, &frame->pretcode, Efault);
 	unsafe_put_sigcontext(&frame->uc.uc_mcontext, fp, regs, set, Efault);
-	unsafe_put_user(set->sig[0], &frame->uc.uc_sigmask.sig[0], Efault);
+	unsafe_put_sigmask(set, frame, Efault);
 	user_access_end();
 
 	if (ksig->ka.sa.sa_flags & SA_SIGINFO) {
@@ -537,7 +541,7 @@ static int x32_setup_rt_frame(struct ksignal *ksig,
 	restorer = ksig->ka.sa.sa_restorer;
 	unsafe_put_user(restorer, (unsigned long __user *)&frame->pretcode, Efault);
 	unsafe_put_sigcontext(&frame->uc.uc_mcontext, fp, regs, set, Efault);
-	unsafe_put_user(*(__u64 *)set, (__u64 __user *)&frame->uc.uc_sigmask, Efault);
+	unsafe_put_sigmask(set, frame, Efault);
 	user_access_end();
 
 	if (ksig->ka.sa.sa_flags & SA_SIGINFO) {