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FEAT_CSSC adds a number of new instructions usable to optimise common short sequences of instructions, add a hwcap indicating that the feature is available and can be used by userspace. Signed-off-by: Mark Brown <broonie@kernel.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Link: https://lore.kernel.org/r/20221017152520.1039165-2-broonie@kernel.org Signed-off-by: Will Deacon <will@kernel.org>