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103423ad7e
Back in 2016, it was argued that implementations lacking a HW prefetcher could be helped by sprinkling a number of PRFM instructions in strategic locations. In 2023, the one platform that presumably needed this hack is no longer in active use (let alone maintained), and an quick experiment shows dropping this hack only leads to a 0.4% drop on a full kernel compilation (tested on a MT30-GS0 48 CPU system). Given that this is pretty much in the noise department and that it may give odd ideas to other implementers, drop the hack for good. Suggested-by: Will Deacon <will@kernel.org> Suggested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Link: https://lore.kernel.org/r/20231122133754.1240687-1-maz@kernel.org Signed-off-by: Will Deacon <will@kernel.org> |
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