compat: Add compat code for vm_insert_page()

From: Trent Piepho <xyzzy@speakeasy.org>

Add an inline versin of vm_insert_page() that uses remap_pfn_range() to
compat.h.

Remove compat code from em28xx-video.c, sn9c102_core.c, and
usbvision-video.c since compat.h is now doing the same thing. 
USB_ZC0301, USB_ET61X251, and USB_ZR364XX will now compile under 2.6.12.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>

3 files changed, 0 insertions, 23 deletions

diff --git a/linux/drivers/media/video/em28xx/em28xx-video.c b/linux/drivers/media/video/em28xx/em28xx-video.c
index f03547db8..3abd11d2b 100644
--- a/linux/drivers/media/video/em28xx/em28xx-video.c
+++ b/linux/drivers/media/video/em28xx/em28xx-video.c
@@ -660,15 +660,8 @@ static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
 
 	pos = dev->frame[i].bufmem;
 	while (size > 0) {	/* size is page-aligned */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
-		unsigned long page = vmalloc_to_pfn(pos);
-		if (remap_pfn_range(vma, start, page, PAGE_SIZE,
-				    vma->vm_page_prot)) {
-			em28xx_videodbg("mmap: rename page map failed\n");
-#else
 		if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
 			em28xx_videodbg("mmap: vm_insert_page failed\n");
-#endif
 			mutex_unlock(&dev->fileop_lock);
 			return -EAGAIN;
 		}
diff --git a/linux/drivers/media/video/sn9c102/sn9c102_core.c b/linux/drivers/media/video/sn9c102/sn9c102_core.c
index ef431d942..956e25041 100644
--- a/linux/drivers/media/video/sn9c102/sn9c102_core.c
+++ b/linux/drivers/media/video/sn9c102/sn9c102_core.c
@@ -2025,13 +2025,7 @@ static int sn9c102_mmap(struct file* filp, struct vm_area_struct *vma)
 
 	pos = cam->frame[i].bufmem;
 	while (size > 0) { /* size is page-aligned */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
-		unsigned long page = vmalloc_to_pfn(pos);
-		if (remap_pfn_range(vma, start, page, PAGE_SIZE,
-			vma->vm_page_prot)) {
-#else
 		if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
-#endif
 			mutex_unlock(&cam->fileop_mutex);
 			return -EAGAIN;
 		}
diff --git a/linux/drivers/media/video/usbvision/usbvision-video.c b/linux/drivers/media/video/usbvision/usbvision-video.c
index 1d0d61469..ff9d1cbbb 100644
--- a/linux/drivers/media/video/usbvision/usbvision-video.c
+++ b/linux/drivers/media/video/usbvision/usbvision-video.c
@@ -1255,21 +1255,11 @@ static int usbvision_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
 	pos = usbvision->frame[i].data;
 	while (size > 0) {
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
-		unsigned long page = vmalloc_to_pfn(pos);
-		if (remap_pfn_range(vma, start, page, PAGE_SIZE,
-				    vma->vm_page_prot)) {
-			PDEBUG(DBG_MMAP, "mmap: rename page map failed");
-			up(&usbvision->lock);
-			return -EAGAIN;
-		}
-#else
 		if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
 			PDEBUG(DBG_MMAP, "mmap: vm_insert_page failed");
 			up(&usbvision->lock);
 			return -EAGAIN;
 		}
-#endif
 		start += PAGE_SIZE;
 		pos += PAGE_SIZE;
 		size -= PAGE_SIZE;