From 310d2e83cb9b7f1e7232319880e3fcb57592fa10 Mon Sep 17 00:00:00 2001 From: Lukas Bulwahn Date: Thu, 19 Aug 2021 13:39:54 +0200 Subject: [PATCH] powerpc: Re-enable ARCH_ENABLE_SPLIT_PMD_PTLOCK Commit 66f24fa766e3 ("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: 66f24fa766e3 ("mm: drop redundant ARCH_ENABLE_SPLIT_PMD_PTLOCK") Cc: stable@vger.kernel.org # v5.13+ Signed-off-by: Lukas Bulwahn Reviewed-by: Daniel Axtens [mpe: Reword change log to make it clear this is a bug fix] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210819113954.17515-3-lukas.bulwahn@gmail.com --- arch/powerpc/platforms/Kconfig.cputype | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index 6794145603de..a208997ade88 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -98,7 +98,7 @@ config PPC_BOOK3S_64 select PPC_HAVE_PMU_SUPPORT select HAVE_ARCH_TRANSPARENT_HUGEPAGE select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION - select ARCH_ENABLE_PMD_SPLIT_PTLOCK + select ARCH_ENABLE_SPLIT_PMD_PTLOCK select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE select ARCH_SUPPORTS_HUGETLBFS select ARCH_SUPPORTS_NUMA_BALANCING