* Intel Corporation, Microsoft Corporation. Advanced Power Management
* (APM) BIOS Interface Specification, Revision 1.2, February 1996.
*
- * [This document is available from Microsoft at:
- * http://www.microsoft.com/hwdev/busbios/amp_12.htm]
+ * This document is available from Microsoft at:
+ * http://www.microsoft.com/whdc/archive/amp_12.mspx
*/
#include <linux/module.h>
#include <linux/poll.h>
* Only when everyone who has opened /dev/apm_bios with write permission
* has acknowledge does the actual suspend happen.
*/
-static int
-apm_ioctl(struct inode * inode, struct file *filp, u_int cmd, u_long arg)
+static long
+apm_ioctl(struct file *filp, u_int cmd, u_long arg)
{
struct apm_user *as = filp->private_data;
int err = -EINVAL;
if (!as->suser || !as->writer)
return -EPERM;
+ lock_kernel();
switch (cmd) {
case APM_IOC_SUSPEND:
mutex_lock(&state_lock);
mutex_unlock(&state_lock);
break;
}
+ unlock_kernel();
return err;
}
.owner = THIS_MODULE,
.read = apm_read,
.poll = apm_poll,
- .ioctl = apm_ioctl,
+ .unlocked_ioctl = apm_ioctl,
.open = apm_open,
.release = apm_release,
};