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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: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Jaya Kumar <jayakumar.lkml@gmail.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2009-12-03 10:31:56 -05:00 committed by Jeremy Fitzhardinge
parent ba69ea42f8
commit 7164bb4393
2 changed files with 4 additions and 1 deletions
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4
drivers/video/fb_defio.c
View File

@ -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) 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_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; vma->vm_private_data = info;
return 0; return 0;
} }

1
include/linux/fb.h
View File

@ -768,6 +768,7 @@ struct fb_tile_ops {
* takes over; acceleration engine should be in a quiescent state */ * takes over; acceleration engine should be in a quiescent state */
/* hints */ /* 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_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering */
#define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */ #define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering */