#include <linux/spinlock.h>
#include <linux/fs.h>
#include <linux/proc_fs.h>
+#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/device.h>
#include <linux/pfn.h>
* release_region releases a matching busy region.
*/
+static DECLARE_WAIT_QUEUE_HEAD(muxed_resource_wait);
+
/**
* __request_region - create a new busy resource region
* @parent: parent resource descriptor
resource_size_t start, resource_size_t n,
const char *name, int flags)
{
+ DECLARE_WAITQUEUE(wait, current);
struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
if (!res)
if (!(conflict->flags & IORESOURCE_BUSY))
continue;
}
-
+ if (conflict->flags & flags & IORESOURCE_MUXED) {
+ add_wait_queue(&muxed_resource_wait, &wait);
+ write_unlock(&resource_lock);
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule();
+ remove_wait_queue(&muxed_resource_wait, &wait);
+ write_lock(&resource_lock);
+ continue;
+ }
/* Uhhuh, that didn't work out.. */
kfree(res);
res = NULL;
break;
*p = res->sibling;
write_unlock(&resource_lock);
+ if (res->flags & IORESOURCE_MUXED)
+ wake_up(&muxed_resource_wait);
kfree(res);
return;
}