Remove checks for HAVE_UNLOCKED_IOCTL for kernel >= 5.9

In upstream commit (4e24566a134ea1674 "fs: remove the HAVE_UNLOCKED_IOCTL and
HAVE_COMPAT_IOCTL defines") [1] the kernel removed these defines.

All supported kernels include support for the unlocked_ioctl now, so
DAHDI can also remove these checks.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4e24566a134ea167441a1ffa3d439a27c

Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

drivers/dahdi/dahdi-base.c

@@ -53,10 +53,6 @@
 #include <linux/ktime.h>
 #include <linux/slab.h>
 
-#if defined(HAVE_UNLOCKED_IOCTL) && defined(CONFIG_BKL)
-#include <linux/smp_lock.h>
-#endif
-
 #include <linux/ppp_defs.h>
 
 #include <asm/atomic.h>
@@ -4069,14 +4065,6 @@ dahdi_timer_unlocked_ioctl(struct file *file, unsigned int cmd,
 	return 0;
 }
 
-#ifndef HAVE_UNLOCKED_IOCTL
-static int dahdi_timer_ioctl(struct inode *inode, struct file *file,
-		unsigned int cmd, unsigned long data)
-{
-	return dahdi_timer_unlocked_ioctl(file, cmd, data);
-}
-#endif
-
 static int dahdi_ioctl_getgains(struct file *file, unsigned long data)
 {
 	int res = 0;
@@ -7011,14 +6999,6 @@ exit:
 	return ret;
 }
 
-#ifndef HAVE_UNLOCKED_IOCTL
-static int dahdi_ioctl(struct inode *inode, struct file *file,
-		unsigned int cmd, unsigned long data)
-{
-	return dahdi_unlocked_ioctl(file, cmd, data);
-}
-#endif
-
 /**
  * _get_next_channo - Return the next taken channel number from the span list.
  * @span:	The span with which to start the search.
@@ -10272,11 +10252,7 @@ static const struct file_operations dahdi_fops = {
 	.owner   = THIS_MODULE,
 	.open    = dahdi_open,
 	.release = dahdi_release,
-#ifdef HAVE_UNLOCKED_IOCTL
 	.unlocked_ioctl  = dahdi_unlocked_ioctl,
-#else
-	.ioctl   = dahdi_ioctl,
-#endif
 	.poll    = dahdi_poll,
 	.read    = dahdi_no_read,
 	.write   = dahdi_no_write,
@@ -10285,11 +10261,7 @@ static const struct file_operations dahdi_fops = {
 static const struct file_operations dahdi_timer_fops = {
 	.owner   = THIS_MODULE,
 	.release = dahdi_timer_release,
-#ifdef HAVE_UNLOCKED_IOCTL
 	.unlocked_ioctl  = dahdi_timer_unlocked_ioctl,
-#else
-	.ioctl   = dahdi_timer_ioctl,
-#endif
 	.poll    = dahdi_timer_poll,
 	.read    = dahdi_no_read,
 	.write   = dahdi_no_write,
@@ -10352,21 +10324,9 @@ nodev_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long data)
 	return nodev_common("ioctl");
 }
 
-#ifndef HAVE_UNLOCKED_IOCTL
-static int nodev_ioctl(struct inode *inode, struct file *file,
-		unsigned int cmd, unsigned long data)
-{
-	return nodev_unlocked_ioctl(file, cmd, data);
-}
-#endif
-
 static const struct file_operations nodev_fops = {
 	.owner   = THIS_MODULE,
-#ifdef HAVE_UNLOCKED_IOCTL
 	.unlocked_ioctl  = nodev_unlocked_ioctl,
-#else
-	.ioctl   = nodev_ioctl,
-#endif
 	.read    = nodev_chan_read,
 	.write   = nodev_chan_write,
 	.poll    = nodev_chan_poll,
@@ -10376,11 +10336,7 @@ static const struct file_operations dahdi_chan_fops = {
 	.owner   = THIS_MODULE,
 	.open    = dahdi_open,
 	.release = dahdi_release,
-#ifdef HAVE_UNLOCKED_IOCTL
 	.unlocked_ioctl  = dahdi_unlocked_ioctl,
-#else
-	.ioctl   = dahdi_ioctl,
-#endif
 	.read    = dahdi_chan_read,
 	.write   = dahdi_chan_write,
 	.poll    = dahdi_chan_poll,

drivers/dahdi/dahdi_transcode.c

@@ -397,13 +397,6 @@ static long dahdi_tc_unlocked_ioctl(struct file *file, unsigned int cmd, unsigne
 	};
 }
 
-#ifndef HAVE_UNLOCKED_IOCTL
-static int dahdi_tc_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long data)
-{
-	return (int)dahdi_tc_unlocked_ioctl(file, cmd, data);
-}
-#endif
-
 static unsigned int dahdi_tc_poll(struct file *file, struct poll_table_struct *wait_table)
 {
 	int ret;
@@ -427,11 +420,7 @@ static struct file_operations __dahdi_transcode_fops = {
 	.owner =   THIS_MODULE,
 	.open =    dahdi_tc_open,
 	.release = dahdi_tc_release,
-#ifdef HAVE_UNLOCKED_IOCTL
 	.unlocked_ioctl  = dahdi_tc_unlocked_ioctl,
-#else
-	.ioctl   = dahdi_tc_ioctl,
-#endif
 	.read =    dahdi_tc_read,
 	.write =   dahdi_tc_write,
 	.poll =    dahdi_tc_poll,