tree 016ab4001a17411758548428af3c4cced70cb052
parent 063aa8e68e53cc0d0961ea90c12cea40c6b94828
author Vladimir Murzin <murzin.v@gmail.com> 1398589752 +0100
committer David Vrabel <david.vrabel@citrix.com> 1398679780 +0100

xen/events/fifo: correctly align bitops

FIFO event channels require bitops on 32-bit aligned values (the event
words).  Linux's bitops require unsigned long alignment which may be
64-bits.

On arm64 an incorrectly unaligned access will fault.

Fix this by aligning the bitops along with an adjustment for bit
position and using an unsigned long for the local copy of the ready
word.

Cc: stable@vger.kernel.org
Signed-off-by: Vladimir Murzin <murzin.v@gmail.com>
Tested-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Reviewed-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>