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#L37
So, I
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
@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() does permit non-page-
aligned
`addr' (at least
...@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.li...@gmail.com]
Sent: Friday, September 14, 2012 2:53 PM
On Thu, 13 Sep 2012 10:40:57 +0800
Bob Liu lliu...@gmail.com 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
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 arch like blackfin and st.
Reported-by: Bhupesh SHARMA
