The patch titled
Subject: powerpc/mm/highmem: use __set_pte_at() for kmap_local()
has been added to the -mm tree. Its filename is
powerpc-mm-highmem-use-__set_pte_at-for-kmap_local.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/powerpc-mm-highmem-use-__set_pte_at-for-kmap_local.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/powerpc-mm-highmem-use-__set_pte_at-for-kmap_local.patch
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------------------------------------------------------
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Subject: 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.
Link: https://lkml.kernel.org/r/20210112170411.281464308@xxxxxxxxxxxxx
Fixes: 47da42b27a56 ("powerpc/mm/highmem: Switch to generic kmap atomic")
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Andreas Larsson <andreas@xxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/include/asm/highmem.h | 2 ++
1 file changed, 2 insertions(+)
--- a/arch/powerpc/include/asm/highmem.h~powerpc-mm-highmem-use-__set_pte_at-for-kmap_local
+++ a/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) \
_
Patches currently in -mm which might be from tglx@xxxxxxxxxxxxx are
sparc-mm-highmem-flush-cache-and-tlb.patch
mm-highmem-prepare-for-overriding-set_pte_at.patch
mips-mm-highmem-use-set_pte-for-kmap_local.patch
powerpc-mm-highmem-use-__set_pte_at-for-kmap_local.patch
