[RFC PATCH] ARM: Add imprecise abort enable/disable macro

[Russell King - ARM Linux]

On Mon, Feb 10, 2014 at 02:42:28PM +0000, Dave Martin wrote:
> Should we require CPSR.A to me masked in Booting, for all CPUs that have
> it?

If it's not masked at boot, then there can't be an imprecise exception
pending.

That's unlike interrupts, where a device could trigger an interrupt at
any moment (eg, a timer expiring.)

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