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* [merged] mm-highmem-prepare-for-overriding-set_pte_at.patch removed from -mm tree
@ 2021-01-25 21:35 akpm
  0 siblings, 0 replies; only message in thread
From: akpm @ 2021-01-25 21:35 UTC (permalink / raw)
  To: andreas, davem, mm-commits, mpe, paul, peterz, tglx, tsbogend

The patch titled
     Subject: mm/highmem: prepare for overriding set_pte_at()
has been removed from the -mm tree.  Its filename was

This patch was dropped because it was merged into mainline or a subsystem tree

From: Thomas Gleixner <>
Subject: mm/highmem: prepare for overriding set_pte_at()

The generic kmap_local() map function uses set_pte_at(), but MIPS requires
set_pte() and PowerPC wants __set_pte_at().

Provide arch_kmap_local_set_pte() and default it to set_pte_at().

Signed-off-by: Thomas Gleixner <>
Cc: Andreas Larsson <>
Cc: "David S. Miller" <>
Cc: Michael Ellerman <>
Cc: Paul Cercueil <>
Cc: Peter Zijlstra <>
Cc: Thomas Bogendoerfer <>
Signed-off-by: Andrew Morton <>

 mm/highmem.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

--- a/mm/highmem.c~mm-highmem-prepare-for-overriding-set_pte_at
+++ a/mm/highmem.c
@@ -473,6 +473,11 @@ static inline void *arch_kmap_local_high
+#ifndef arch_kmap_local_set_pte
+#define arch_kmap_local_set_pte(mm, vaddr, ptep, ptev)	\
+	set_pte_at(mm, vaddr, ptep, ptev)
 /* Unmap a local mapping which was obtained by kmap_high_get() */
 static inline bool kmap_high_unmap_local(unsigned long vaddr)
@@ -515,7 +520,7 @@ void *__kmap_local_pfn_prot(unsigned lon
 	vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
 	BUG_ON(!pte_none(*(kmap_pte - idx)));
 	pteval = pfn_pte(pfn, prot);
-	set_pte_at(&init_mm, vaddr, kmap_pte - idx, pteval);
+	arch_kmap_local_set_pte(&init_mm, vaddr, kmap_pte - idx, pteval);
 	arch_kmap_local_post_map(vaddr, pteval);
 	current->kmap_ctrl.pteval[kmap_local_idx()] = pteval;

Patches currently in -mm which might be from are

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2021-01-25 21:35 [merged] mm-highmem-prepare-for-overriding-set_pte_at.patch removed from -mm tree akpm

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