ia64: add __NR_umount2 definition

Other architectures commonly use __NR_umount2 for sys_umount,
only ia64 and alpha use __NR_umount here. In order to synchronize
the generated tables, use umount2 like everyone else, and add back
the old name from asm/unistd.h for compatibility.

The __IGNORE_* lines are now all obsolete and can be removed as
a side-effect.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/ia64/include/asm/unistd.h

@@ -12,20 +12,6 @@
 
 #define NR_syscalls		__NR_syscalls /* length of syscall table */
 
-/*
- * The following defines stop scripts/checksyscalls.sh from complaining about
- * unimplemented system calls.  Glibc provides for each of these by using
- * more modern equivalent system calls.
- */
-#define __IGNORE_fork		/* clone() */
-#define __IGNORE_time		/* gettimeofday() */
-#define __IGNORE_alarm		/* setitimer(ITIMER_REAL, ... */
-#define __IGNORE_pause		/* rt_sigprocmask(), rt_sigsuspend() */
-#define __IGNORE_utime		/* utimes() */
-#define __IGNORE_getpgrp	/* getpgid() */
-#define __IGNORE_vfork		/* clone() */
-#define __IGNORE_umount2	/* umount() */
-
 #define __ARCH_WANT_NEW_STAT
 #define __ARCH_WANT_SYS_UTIME
 

arch/ia64/include/uapi/asm/unistd.h

@@ -15,6 +15,8 @@
 
 #define __NR_Linux      1024
 
+#define __NR_umount __NR_umount2
+
 #include <asm/unistd_64.h>
 
 #endif /* _UAPI_ASM_IA64_UNISTD_H */

arch/ia64/kernel/syscalls/syscall.tbl

@@ -29,7 +29,7 @@
 17	common	getpid				sys_getpid
 18	common	getppid				sys_getppid
 19	common	mount				sys_mount
-20	common	umount				sys_umount
+20	common	umount2				sys_umount
 21	common	setuid				sys_setuid
 22	common	getuid				sys_getuid
 23	common	geteuid				sys_geteuid