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powerpc: Re-enable ARCH_ENABLE_SPLIT_PMD_PTLOCK
Commit66f24fa766
("mm: drop redundant ARCH_ENABLE_SPLIT_PMD_PTLOCK") broke PMD split page table lock for powerpc. It selects the non-existent config ARCH_ENABLE_PMD_SPLIT_PTLOCK in arch/powerpc/platforms/Kconfig.cputype, but clearly intended to select ARCH_ENABLE_SPLIT_PMD_PTLOCK (notice the word swapping!), as that commit did for all other architectures. Fix it by selecting the correct symbol ARCH_ENABLE_SPLIT_PMD_PTLOCK. Fixes:66f24fa766
("mm: drop redundant ARCH_ENABLE_SPLIT_PMD_PTLOCK") Cc: stable@vger.kernel.org # v5.13+ Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Reviewed-by: Daniel Axtens <dja@axtens.net> [mpe: Reword change log to make it clear this is a bug fix] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210819113954.17515-3-lukas.bulwahn@gmail.com
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@ -98,7 +98,7 @@ config PPC_BOOK3S_64
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select PPC_HAVE_PMU_SUPPORT
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select HAVE_ARCH_TRANSPARENT_HUGEPAGE
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select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
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select ARCH_ENABLE_PMD_SPLIT_PTLOCK
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select ARCH_ENABLE_SPLIT_PMD_PTLOCK
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select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
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select ARCH_SUPPORTS_HUGETLBFS
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select ARCH_SUPPORTS_NUMA_BALANCING
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