1 files changed, 0 insertions, 185 deletions
diff --git a/drivers/video/fb_defio.c b/drivers/video/fb_defio.c
deleted file mode 100644
index 59df132cc37..00000000000
--- a/drivers/video/fb_defio.c
+++ /dev/null
@@ -1,185 +0,0 @@
-/*
- *  linux/drivers/video/fb_defio.c
- *
- *  Copyright (C) 2006 Jaya Kumar
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/fb.h>
-#include <linux/list.h>
-
-/* to support deferred IO */
-#include <linux/rmap.h>
-#include <linux/pagemap.h>
-
-/* this is to find and return the vmalloc-ed fb pages */
-static int fb_deferred_io_fault(struct vm_area_struct *vma,
-				struct vm_fault *vmf)
-{
-	unsigned long offset;
-	struct page *page;
-	struct fb_info *info = vma->vm_private_data;
-	/* info->screen_base is virtual memory */
-	void *screen_base = (void __force *) info->screen_base;
-
-	offset = vmf->pgoff << PAGE_SHIFT;
-	if (offset >= info->fix.smem_len)
-		return VM_FAULT_SIGBUS;
-
-	page = vmalloc_to_page(screen_base + offset);
-	if (!page)
-		return VM_FAULT_SIGBUS;
-
-	get_page(page);
-
-	if (vma->vm_file)
-		page->mapping = vma->vm_file->f_mapping;
-	else
-		printk(KERN_ERR "no mapping available\n");
-
-	BUG_ON(!page->mapping);
-	page->index = vmf->pgoff;
-
-	vmf->page = page;
-	return 0;
-}
-
-int fb_deferred_io_fsync(struct file *file, struct dentry *dentry, int datasync)
-{
-	struct fb_info *info = file->private_data;
-
-	/* Kill off the delayed work */
-	cancel_rearming_delayed_work(&info->deferred_work);
-
-	/* Run it immediately */
-	return schedule_delayed_work(&info->deferred_work, 0);
-}
-EXPORT_SYMBOL_GPL(fb_deferred_io_fsync);
-
-/* vm_ops->page_mkwrite handler */
-static int fb_deferred_io_mkwrite(struct vm_area_struct *vma,
-				  struct page *page)
-{
-	struct fb_info *info = vma->vm_private_data;
-	struct fb_deferred_io *fbdefio = info->fbdefio;
-	struct page *cur;
-
-	/* this is a callback we get when userspace first tries to
-	write to the page. we schedule a workqueue. that workqueue
-	will eventually mkclean the touched pages and execute the
-	deferred framebuffer IO. then if userspace touches a page
-	again, we repeat the same scheme */
-
-	/* protect against the workqueue changing the page list */
-	mutex_lock(&fbdefio->lock);
-
-	/* we loop through the pagelist before adding in order
-	to keep the pagelist sorted */
-	list_for_each_entry(cur, &fbdefio->pagelist, lru) {
-		/* this check is to catch the case where a new
-		process could start writing to the same page
-		through a new pte. this new access can cause the
-		mkwrite even when the original ps's pte is marked
-		writable */
-		if (unlikely(cur == page))
-			goto page_already_added;
-		else if (cur->index > page->index)
-			break;
-	}
-
-	list_add_tail(&page->lru, &cur->lru);
-
-page_already_added:
-	mutex_unlock(&fbdefio->lock);
-
-	/* come back after delay to process the deferred IO */
-	schedule_delayed_work(&info->deferred_work, fbdefio->delay);
-	return 0;
-}
-
-static struct vm_operations_struct fb_deferred_io_vm_ops = {
-	.fault		= fb_deferred_io_fault,
-	.page_mkwrite	= fb_deferred_io_mkwrite,
-};
-
-static int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma)
-{
-	vma->vm_ops = &fb_deferred_io_vm_ops;
-	vma->vm_flags |= ( VM_IO | VM_RESERVED | VM_DONTEXPAND );
-	vma->vm_private_data = info;
-	return 0;
-}
-
-/* workqueue callback */
-static void fb_deferred_io_work(struct work_struct *work)
-{
-	struct fb_info *info = container_of(work, struct fb_info,
-						deferred_work.work);
-	struct list_head *node, *next;
-	struct page *cur;
-	struct fb_deferred_io *fbdefio = info->fbdefio;
-
-	/* here we mkclean the pages, then do all deferred IO */
-	mutex_lock(&fbdefio->lock);
-	list_for_each_entry(cur, &fbdefio->pagelist, lru) {
-		lock_page(cur);
-		page_mkclean(cur);
-		unlock_page(cur);
-	}
-
-	/* driver's callback with pagelist */
-	fbdefio->deferred_io(info, &fbdefio->pagelist);
-
-	/* clear the list */
-	list_for_each_safe(node, next, &fbdefio->pagelist) {
-		list_del(node);
-	}
-	mutex_unlock(&fbdefio->lock);
-}
-
-void fb_deferred_io_init(struct fb_info *info)
-{
-	struct fb_deferred_io *fbdefio = info->fbdefio;
-
-	BUG_ON(!fbdefio);
-	mutex_init(&fbdefio->lock);
-	info->fbops->fb_mmap = fb_deferred_io_mmap;
-	INIT_DELAYED_WORK(&info->deferred_work, fb_deferred_io_work);
-	INIT_LIST_HEAD(&fbdefio->pagelist);
-	if (fbdefio->delay == 0) /* set a default of 1 s */
-		fbdefio->delay = HZ;
-}
-EXPORT_SYMBOL_GPL(fb_deferred_io_init);
-
-void fb_deferred_io_cleanup(struct fb_info *info)
-{
-	void *screen_base = (void __force *) info->screen_base;
-	struct fb_deferred_io *fbdefio = info->fbdefio;
-	struct page *page;
-	int i;
-
-	BUG_ON(!fbdefio);
-	cancel_delayed_work(&info->deferred_work);
-	flush_scheduled_work();
-
-	/* clear out the mapping that we setup */
-	for (i = 0 ; i < info->fix.smem_len; i += PAGE_SIZE) {
-		page = vmalloc_to_page(screen_base + i);
-		page->mapping = NULL;
-	}
-}
-EXPORT_SYMBOL_GPL(fb_deferred_io_cleanup);
-
-MODULE_LICENSE("GPL");