[IA64] perfmon: convert to unlocked_ioctl

The ioctl function in this driver does not
do anything that requires the BKL, so make
it use unlocked_ioctl.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/perfmon.c

@@ -1696,8 +1696,8 @@ pfm_poll(struct file *filp, poll_table * wait)
 	return mask;
 }
 
-static int
-pfm_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+static long
+pfm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	DPRINT(("pfm_ioctl called\n"));
 	return -EINVAL;
@@ -2178,7 +2178,7 @@ static const struct file_operations pfm_file_ops = {
 	.read		= pfm_read,
 	.write		= pfm_write,
 	.poll		= pfm_poll,
-	.ioctl    = pfm_ioctl,
+	.unlocked_ioctl = pfm_ioctl,
 	.open		= pfm_no_open,	/* special open code to disallow open via /proc */
 	.fasync		= pfm_fasync,
 	.release	= pfm_close,