> 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. -- 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=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>