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authorMark Brown <broonie@kernel.org>2022-07-07 11:36:31 +0100
committerWill Deacon <will@kernel.org>2022-07-20 11:18:11 +0100
commit60c868eff2bc59656ff449258d30da23adae544a (patch)
tree5e0a3850bc512dbe08d1ba991bfef8383a988efe /Documentation
parentarm64/hwcap: Document allocation of upper bits of AT_HWCAP (diff)
downloadlinux-dev-60c868eff2bc59656ff449258d30da23adae544a.tar.xz
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arm64/cpufeature: Store elf_hwcaps as a bitmap rather than unsigned long
When we added support for AT_HWCAP2 we took advantage of the fact that we have limited hwcaps to the low 32 bits and stored it along with AT_HWCAP in a single unsigned integer. Thanks to the ever expanding capabilities of the architecture we have now allocated all 64 of the bits in an unsigned long so in preparation for adding more hwcaps convert elf_hwcap to be a bitmap instead, with 64 bits allocated to each AT_HWCAP. There should be no functional change from this patch. Signed-off-by: Mark Brown <broonie@kernel.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Link: https://lore.kernel.org/r/20220707103632.12745-3-broonie@kernel.org Signed-off-by: Will Deacon <will@kernel.org>
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