After merging the rcu tree an arm64 defconfig fails to build with:
/home/broonie/tmpfs/next/drivers/firmware/tegra/ivc.c: In function 'tegra_ivc_ad
vance_tx':
/home/broonie/tmpfs/next/drivers/firmware/tegra/ivc.c:154:39: error: lvalue required as left operand of assignment
READ_ONCE(ivc->tx.channel->tx.count) =
^
/home/broonie/tmpfs/next/drivers/firmware/tegra/ivc.c: In function 'tegra_ivc_advance_rx':
/home/broonie/tmpfs/next/drivers/firmware/tegra/ivc.c:165:39: error: lvalue required as left operand of assignment
READ_ONCE(ivc->rx.channel->rx.count) =
^
/home/broonie/tmpfs/next/scripts/Makefile.build:313: recipe for target 'drivers/firmware/tegra/ivc.o' failed
caused by 669f98e232aa6f77bd60 ("drivers/firmware/tegra: Convert
ACCESS_ONCE() to READ_ONCE()") in the rcu tree. I've reverted to the
RCU version from September 28th (which is already in Linus' tree).
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