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pktcdvd: improve BKL and compat_ioctl.c usage

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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 <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Arnd Bergmann 2010-04-28 14:36:41 +02:00 • committed by Linus Torvalds
commit f80a0ca6ad
2 changed files with 14 additions and 6 deletions
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17
drivers/block/pktcdvd.c
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@ -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 @@ static void pkt_get_status(struct pkt_ctrl_command *ctrl_cmd)
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 @@ static int pkt_ctl_ioctl(struct inode *inode, struct file *file, unsigned int cm
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 = {