pktcdvd: improve BKL and compat_ioctl.c usage
The pktcdvd driver uses proper locking and does not need the BKL in the
ioctl and llseek functions of the character device, so kill both.
Moving the compat_ioctl handling from common code into the driver itself
fixes build problems when CONFIG_BLOCK is disabled.
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index ddf1942..8a549db 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -48,6 +48,7 @@
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
+#include <linux/compat.h>
#include <linux/kthread.h>
#include <linux/errno.h>
#include <linux/spinlock.h>
@@ -2984,7 +2985,7 @@
mutex_unlock(&ctl_mutex);
}
-static int pkt_ctl_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+static long pkt_ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
struct pkt_ctrl_command ctrl_cmd;
@@ -3021,10 +3022,20 @@
return ret;
}
+#ifdef CONFIG_COMPAT
+static long pkt_ctl_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ return pkt_ctl_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
static const struct file_operations pkt_ctl_fops = {
- .ioctl = pkt_ctl_ioctl,
- .owner = THIS_MODULE,
+ .open = nonseekable_open,
+ .unlocked_ioctl = pkt_ctl_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = pkt_ctl_compat_ioctl,
+#endif
+ .owner = THIS_MODULE,
};
static struct miscdevice pkt_misc = {