[PATCH v2] aarch64: MTE compatible strchr

[Szabolcs Nagy]

The 06/05/2020 17:20, Andrea Corallo wrote:
> Introduce an Arm MTE compatible strchr implementation.
> 
> The existing implementation assumes that any access to the pages in
> which the string resides is safe.  This assumption is not true when
> MTE is enabled.  This patch updates the algorithm to ensure that
> accesses remain within the bounds of an MTE tag (16-byte chunks) and
> improves overall performance.
> 
> Benchmarked on Cortex-A72, Cortex-A53, Neoverse N1.
> 
> Co-authored-by: Wilco Dijkstra <wilco.dijkstra@arm.com>

this is ok to commit.