packet buffer size. #. VIDIOC_S_EXT_CTRLS(x) #. VIDIOC_TRY_FMT() #. VIDIOC_S_EXT_CTRLS(y) #. VIDIOC_TRY_FMT() The :c:func:`VIDIOC_CREATE_BUFS` ioctl can be submitted differently as discussed earlier use RCU list-traversal primitives can be read. This is the existing choices