kfifo_avail expands to __kfifo_max_r which is not an exported symbol.
Any kernel module using kfifo_avail will result in build failures
because of this.
This patch just exports __kfifo_max_r symbol to fix such problems in
future.
Reported-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NSrinivas Kandagatla <srinivas.kandagatla@st.com>
Acked-by: NStefani Seibold <stefani@seibold.net>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>