Re: [PATCH v2] arm64: mte: avoid TFSR related operations unless in async mode

On Thu, 8 Jul 2021 19:35:32 -0700, Peter Collingbourne wrote:

There is no reason to touch TFSR nor issue a DSB unless our task is
in asynchronous mode. Since these operations (especially the DSB)
may be expensive on certain microarchitectures, only perform them
if necessary.

Furthermore, stop clearing TFSR on entry because it will be cleared
on exit and it is not necessary to have any particular value in TFSR
between entry and exit.

Applied to arm64 (for-next/mte), thanks!

[1/1] arm64: mte: avoid TFSR related operations unless in async mode
      https://git.kernel.org/arm64/c/42b6b10a54f0

-- 
Catalin


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