> -----Original Message----- > From: Scott Jiang [mailto:scott.jiang.linux@xxxxxxxxx] > Sent: Friday, September 14, 2012 2:53 PM > To: Andrew Morton > Cc: Bob Liu; linux-mm@xxxxxxxxx; Bhupesh SHARMA; > laurent.pinchart@xxxxxxxxxxxxxxxx; uclinux-dist- > devel@xxxxxxxxxxxxxxxxxxxx; linux-media@xxxxxxxxxxxxxxx; > dhowells@xxxxxxxxxx; geert@xxxxxxxxxxxxxx; gerg@xxxxxxxxxxx; > stable@xxxxxxxxxx; gregkh@xxxxxxxxxxxxxxxxxxx; 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, 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-aligned userspace address. > > > > So I'm thinking that we should declare ((addr & ~PAGE_MASK) != 0) to > > be a caller bug, and fix up this regrettably unidentified v4l driver? > > I agree. This should be fixed in videobuf. > > Hi sharma, what's your kernel version? It seems videobuf2 already fixed this > bug in 3.5. Hi Scott, I was using 3.3 linux kernel. I will again check if videobuf2 in 3.5 has already fixed this issue. Regards, Bhupesh -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href