alpha: use syscall wrappers

Convert OSF syscalls and add alpha specific SYSCALL_ALIAS() macro.

Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S
index aa2e50c..e4a54b6 100644
--- a/arch/alpha/kernel/entry.S
+++ b/arch/alpha/kernel/entry.S
@@ -933,7 +933,7 @@
 osf_sigprocmask:
 	.prologue 0
 	mov	$sp, $18
-	jmp	$31, do_osf_sigprocmask
+	jmp	$31, sys_osf_sigprocmask
 .end osf_sigprocmask
 
 	.align	4