* 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>
#include <linux/slab.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/miscdevice.h>
/*
* Local variables
*/
+static DEFINE_MUTEX(apm_mutex);
static atomic_t suspend_acks_pending = ATOMIC_INIT(0);
static atomic_t userspace_notification_inhibit = ATOMIC_INIT(0);
static int apm_disabled;
if (!as->suser || !as->writer)
return -EPERM;
- lock_kernel();
+ mutex_lock(&apm_mutex);
switch (cmd) {
case APM_IOC_SUSPEND:
mutex_lock(&state_lock);
mutex_unlock(&state_lock);
break;
}
- unlock_kernel();
+ mutex_unlock(&apm_mutex);
return err;
}
{
struct apm_user *as;
- lock_kernel();
+ mutex_lock(&apm_mutex);
as = kzalloc(sizeof(*as), GFP_KERNEL);
if (as) {
/*
filp->private_data = as;
}
- unlock_kernel();
+ mutex_unlock(&apm_mutex);
return as ? 0 : -ENOMEM;
}
.unlocked_ioctl = apm_ioctl,
.open = apm_open,
.release = apm_release,
+ .llseek = noop_llseek,
};
static struct miscdevice apm_device = {