ARM: add PROC_VTABLE and PROC_TABLE macros
Commit e209950fdd065d2cc46e6338e47e52841b830cba upstream. Allow the way we access members of the processor vtable to be changed at compile time. We will need to move to per-CPU vtables to fix the Spectre variant 2 issues on big.Little systems. However, we have a couple of calls that do not need the vtable treatment, and indeed cause a kernel warning due to the (later) use of smp_processor_id(), so also introduce the PROC_TABLE macro for these which always use CPU 0's function pointers. Reviewed-by: NJulien Thierry <julien.thierry@arm.com> Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk> Signed-off-by: NDavid A. Long <dave.long@linaro.org> Reviewed-by: NJulien Thierry <julien.thierry@arm.com> Tested-by: NJulien Thierry <julien.thierry@arm.com> Signed-off-by: NSasha Levin <sashal@kernel.org>
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