arm64/sme: Disable ZA and streaming mode when handling signals
The ABI requires that streaming mode and ZA are disabled when invoking signal handlers, do this in setup_return() when we prepare the task state for the signal handler. Signed-off-by: Mark Brown <broonie@kernel.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Link: https://lore.kernel.org/r/20220419112247.711548-18-broonie@kernel.orgSigned-off-by: Catalin Marinas <catalin.marinas@arm.com>
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