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acornfb: remove fb_mmap function

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The driver's fb_mmap function is essentially the same as a generic fb_mmap
function.  Delete driver's function and use the generic one.

A difference is that generic function marks frame buffer memory as VM_IO |
VM_RESERVED.  The driver's function marks it as VM_IO only.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Krzysztof Helt 2009-06-16 15:34:32 -07:00 committed by Linus Torvalds
parent 24f01dcb53
commit 34308fd4a2
1 changed files with 0 additions and 38 deletions
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38
drivers/video/acornfb.c
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@ -859,43 +859,6 @@ acornfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
return 0;
}
/*
* Note that we are entered with the kernel locked.
*/
static int
acornfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
unsigned long off, start;
u32 len;
off = vma->vm_pgoff << PAGE_SHIFT;
start = info->fix.smem_start;
len = PAGE_ALIGN(start & ~PAGE_MASK) + info->fix.smem_len;
start &= PAGE_MASK;
if ((vma->vm_end - vma->vm_start + off) > len)
return -EINVAL;
off += start;
vma->vm_pgoff = off >> PAGE_SHIFT;
/* This is an IO map - tell maydump to skip this VMA */
vma->vm_flags |= VM_IO;
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
/*
* Don't alter the page protection flags; we want to keep the area
* cached for better performance. This does mean that we may miss
* some updates to the screen occasionally, but process switches
* should cause the caches and buffers to be flushed often enough.
*/
if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
vma->vm_end - vma->vm_start,
vma->vm_page_prot))
return -EAGAIN;
return 0;
}
static struct fb_ops acornfb_ops = {
.owner = THIS_MODULE,
.fb_check_var = acornfb_check_var,
@ -905,7 +868,6 @@ static struct fb_ops acornfb_ops = {
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_mmap = acornfb_mmap,
};
/*