[RFC PATCH v3] ARM: uprobes need icache flush after xol write

[David Miller]

From: Russell King - ARM Linux <linux at arm.linux.org.uk>
Date: Wed, 16 Apr 2014 21:22:43 +0100

> I'm thinking that both flush_icache_alias() and flush_pfn_alias() want
> at least a preemption disabled around each so that we don't end up with
> two threads being preempted here.

Yes, you would need to disable preemption to keep another thread of
control from potentially using the same flush slot.