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[16/19] mips/mm/highmem: use set_pte() for kmap_local()

Message ID 20210124050207.kzNYUeyrW%akpm@linux-foundation.org (mailing list archive)
State New, archived
Headers show
Series [01/19] x86/setup: don't remove E820_TYPE_RAM for pfn 0 | expand

Commit Message

Andrew Morton Jan. 24, 2021, 5:02 a.m. UTC 
From: Thomas Gleixner <tglx@linutronix.de>
Subject: mips/mm/highmem: use set_pte() for kmap_local()

set_pte_at() on MIPS invokes update_cache() which might recurse into
kmap_local().  Use set_pte() like the original MIPS highmem implementation
did.

Link: https://lkml.kernel.org/r/20210112170411.187513575@linutronix.de
Fixes: a4c33e83bca1 ("mips/mm/highmem: Switch to generic kmap atomic")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reported-by: Paul Cercueil <paul@crapouillou.net>
Reported-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/mips/include/asm/highmem.h |    1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

--- a/arch/mips/include/asm/highmem.h~mips-mm-highmem-use-set_pte-for-kmap_local
+++ a/arch/mips/include/asm/highmem.h
@@ -51,6 +51,7 @@  extern void kmap_flush_tlb(unsigned long
 
 #define flush_cache_kmaps()	BUG_ON(cpu_has_dc_aliases)
 
+#define arch_kmap_local_set_pte(mm, vaddr, ptep, ptev)	set_pte(ptep, ptev)
 #define arch_kmap_local_post_map(vaddr, pteval)	local_flush_tlb_one(vaddr)
 #define arch_kmap_local_post_unmap(vaddr)	local_flush_tlb_one(vaddr)