Hi, I have a question about V4L2_MEMORY_USERPTR: >From which context are the kernel's "copy_to_user()" functions called in relation to V4L2_MEMORY_USERPTR ? Can this be a USB callback function or is it only syscalls, like read/write/ioctl that are allowed to call "copy_to_user()" ? The reason for asking is that I am maintaining a userland port of the media tree's USB drivers for FreeBSD. At the present moment it is not allowed to call copy_to_user() or copy_from_user() unless the backtrace shows a syscall, so the V4L2_MEMORY_USERPTR feature is simply removed and disabled. I'm currently thinking how I can enable this feature. --HPS -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
