alpha: Wire up missing/new syscalls

This wire up the: fallocate, timerfd_create, timerfd_settime,
timerfd_gettime, signalfd4, eventfd2, epoll_create1, dup3, pipe2,
inotify_init1, preadv, pwritev and rt_tgsigqueueinfo syscalls for
the alpha port.

For umount2, alpha have an "old" and "new" version called: oldumount and
umount; so ignore umount2.

Rebased on top of 6e17e8b9fb74b9fb9f6ea331f7f4a049c5b4c4b8 by Matt
Turner.

Signed-off-by: Daniele Calore <orkaan@orkaan.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Matt Turner <mattst88@gmail.com>

arch/alpha/include/asm/unistd.h

@@ -247,6 +247,7 @@
 #define __IGNORE_pause
 #define __IGNORE_time
 #define __IGNORE_utime
+#define __IGNORE_umount2
 
 /*
  * Linux-specific system calls begin at 300
@@ -434,10 +435,23 @@
 #define __NR_timerfd			477
 #define __NR_eventfd			478
 #define __NR_recvmmsg			479
+#define __NR_fallocate			480
+#define __NR_timerfd_create		481
+#define __NR_timerfd_settime		482
+#define __NR_timerfd_gettime		483
+#define __NR_signalfd4			484
+#define __NR_eventfd2			485
+#define __NR_epoll_create1		486
+#define __NR_dup3			487
+#define __NR_pipe2			488
+#define __NR_inotify_init1		489
+#define __NR_preadv			490
+#define __NR_pwritev			491
+#define __NR_rt_tgsigqueueinfo		492
 
 #ifdef __KERNEL__
 
-#define NR_SYSCALLS			480
+#define NR_SYSCALLS			493
 
 #define __ARCH_WANT_IPC_PARSE_VERSION
 #define __ARCH_WANT_OLD_READDIR

arch/alpha/kernel/systbls.S

@@ -495,9 +495,22 @@ sys_call_table:
 	.quad sys_epoll_pwait
 	.quad sys_utimensat			/* 475 */
 	.quad sys_signalfd
-	.quad sys_ni_syscall
+	.quad sys_ni_syscall			/* sys_timerfd */
 	.quad sys_eventfd
 	.quad sys_recvmmsg
+	.quad sys_fallocate				/* 480 */
+	.quad sys_timerfd_create
+	.quad sys_timerfd_settime
+	.quad sys_timerfd_gettime
+	.quad sys_signalfd4
+	.quad sys_eventfd2				/* 485 */
+	.quad sys_epoll_create1
+	.quad sys_dup3
+	.quad sys_pipe2
+	.quad sys_inotify_init1
+	.quad sys_preadv				/* 490 */
+	.quad sys_pwritev
+	.quad sys_rt_tgsigqueueinfo
 
 	.size sys_call_table, . - sys_call_table
 	.type sys_call_table, @object