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Date:   Tue, 12 Jan 2021 18:01:40 +0100
From:   Thomas Gleixner <>
To:     LKML <>
Cc:     Andrew Morton <>,,
        Peter Zijlstra <>,
        Michael Ellerman <>,,
        Andreas Larsson <>,
        "David S. Miller" <>,, Paul Cercueil <>,
        Thomas Bogendoerfer <>
Subject: [patch 4/4] powerpc/mm/highmem: Use __set_pte_at() for kmap_local()

The original PowerPC highmem mapping function used __set_pte_at() to denote
that the mapping is per CPU. This got lost with the conversion to the
generic implementation.

Override the default map function.

Fixes: 47da42b27a56 ("powerpc/mm/highmem: Switch to generic kmap atomic")
Signed-off-by: Thomas Gleixner <>
Cc: Michael Ellerman <>
 arch/powerpc/include/asm/highmem.h |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/powerpc/include/asm/highmem.h
+++ b/arch/powerpc/include/asm/highmem.h
@@ -58,6 +58,8 @@ extern pte_t *pkmap_page_table;
 #define flush_cache_kmaps()	flush_cache_all()
+#define arch_kmap_local_set_pte(mm, vaddr, ptep, ptev)	\
+	__set_pte_at(mm, vaddr, ptep, ptev, 1)
 #define arch_kmap_local_post_map(vaddr, pteval)	\
 	local_flush_tlb_page(NULL, vaddr)
 #define arch_kmap_local_post_unmap(vaddr)	\

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