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Commit 7164bb43 authored by Konrad Rzeszutek Wilk's avatar Konrad Rzeszutek Wilk Committed by Jeremy Fitzhardinge
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fb-defio: If FBINFO_VIRTFB is defined, do not set VM_IO flag. 



Most users (except sh_mobile_lcdcfb.c) get their framebuffer from
vmalloc. Setting VM_IO is not necessary as the memory obtained
from vmalloc is System RAM type and is not susceptible to PCI memory
constraints.

Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: default avatarJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: default avatarJaya Kumar <jayakumar.lkml@gmail.com>
parent ba69ea42

drivers/video/fb_defio.c

+3 −1
Original line number Diff line number Diff line
@@ -144,7 +144,9 @@ static const struct address_space_operations fb_deferred_io_aops = { 
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_flags |= ( VM_RESERVED | VM_DONTEXPAND );

	if (!(info->flags & FBINFO_VIRTFB))

		vma->vm_flags |= VM_IO;

	vma->vm_private_data = info;

	return 0;

}

include/linux/fb.h

+1 −0
Original line number Diff line number Diff line
@@ -768,6 +768,7 @@ struct fb_tile_ops { 
	 *  takes over; acceleration engine should be in a quiescent state */



/* hints */

#define FBINFO_VIRTFB		0x0004 /* FB is System RAM, not device. */

#define FBINFO_PARTIAL_PAN_OK	0x0040 /* otw use pan only for double-buffering */

#define FBINFO_READS_FAST	0x0080 /* soft-copy faster than rendering */