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SubjectRe: [PATCH V4 03/17] arm64/cpufeature: Make doublelock a signed feature in ID_AA64DFR0
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On 05/19/2020 10:40 AM, Anshuman Khandual wrote:
> Double lock feature can have the following possible values.
>
> 0b0000 - Double lock implemented
> 0b1111 - Double lock not implemented
>
> But in case of a conflict the safe value should be 0b1111. Hence this must
> be a signed feature instead. Also change FTR_EXACT to FTR_LOWER_SAFE. While
> here, fix the erroneous bit width value from 28 to 4.
>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will@kernel.org>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-kernel@vger.kernel.org
>
> Suggested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>

Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>

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