>> I was using 3.3 linux kernel. I will again check if videobuf2 in 3.5 has
>> already
>> fixed this issue.
>
> [snip..]
>
> Ok I just checked the vb2_dma_contig allocator and it has no major changes
> from my version,
> http://lxr.linux.no/linux+v3.5.3/drivers/media/video/videobuf2-dma-contig.c#
g;
> dhowe...@redhat.com; ge...@linux-m68k.org; g...@uclinux.org;
> sta...@kernel.org; gre...@linuxfoundation.org; Hugh Dickins
> Subject: RE: [PATCH] nommu: remap_pfn_range: fix addr parameter check
>
> > -Original Message-
> > From: Scott Jiang [mailto:scott.jiang.l
inux.org; linux-media@vger.kernel.org;
> dhowe...@redhat.com; ge...@linux-m68k.org; g...@uclinux.org;
> sta...@kernel.org; gre...@linuxfoundation.org; Hugh Dickins
> Subject: Re: [PATCH] nommu: remap_pfn_range: fix addr parameter check
>
> > Yes, the MMU version of remap_pfn_range() do
> Yes, the MMU version of remap_pfn_range() does permit non-page-aligned
> `addr' (at least, if the userspace maaping is a non-COW one). But I
> suspect that was an implementation accident - it is a nonsensical thing
> to do, isn't it? The MMU cannot map a bunch of kernel pages onto a
> non-page-
On Thu, 13 Sep 2012 10:40:57 +0800
Bob Liu wrote:
> The addr parameter may not page aligned eg. when it's come from
> vfb_mmap():vma->vm_start in video driver.
>
> This patch fix the check in remap_pfn_range() else some driver like v4l2 will
> fail in this function while calling mmap() on nommu
