From 32b53c012e0bfe20b2745962a89db0dc72ef3270 Mon Sep 17 00:00:00 2001 From: Reza Arbab Date: Tue, 3 Jan 2017 14:39:51 -0600 Subject: powerpc/mm: Fix memory hotplug BUG() on radix Memory hotplug is leading to hash page table calls, even on radix: arch_add_memory create_section_mapping htab_bolt_mapping BUG_ON(!ppc_md.hpte_insert); To fix, refactor {create,remove}_section_mapping() into hash__ and radix__ variants. Leave the radix versions stubbed for now. Reviewed-by: Aneesh Kumar K.V Acked-by: Balbir Singh Signed-off-by: Reza Arbab Signed-off-by: Michael Ellerman --- arch/powerpc/mm/pgtable-book3s64.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'arch/powerpc/mm/pgtable-book3s64.c') diff --git a/arch/powerpc/mm/pgtable-book3s64.c b/arch/powerpc/mm/pgtable-book3s64.c index ebf9782bacf9..653ff6c74ebe 100644 --- a/arch/powerpc/mm/pgtable-book3s64.c +++ b/arch/powerpc/mm/pgtable-book3s64.c @@ -126,3 +126,21 @@ void mmu_cleanup_all(void) else if (mmu_hash_ops.hpte_clear_all) mmu_hash_ops.hpte_clear_all(); } + +#ifdef CONFIG_MEMORY_HOTPLUG +int create_section_mapping(unsigned long start, unsigned long end) +{ + if (radix_enabled()) + return -ENODEV; + + return hash__create_section_mapping(start, end); +} + +int remove_section_mapping(unsigned long start, unsigned long end) +{ + if (radix_enabled()) + return -ENODEV; + + return hash__remove_section_mapping(start, end); +} +#endif /* CONFIG_MEMORY_HOTPLUG */ -- cgit v1.2.3