From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, Peter Zijlstra <peterz@infradead.org>,
Paul Cercueil <paul@crapouillou.net>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Andreas Larsson <andreas@gaisler.com>,
"David S. Miller" <davem@davemloft.net>,
sparclinux@vger.kernel.org, Michael Ellerman <mpe@ellerman.id.au>,
linuxppc-dev@lists.ozlabs.org
Subject: [patch 3/4] mips/mm/highmem: Use set_pte() for kmap_local()
Date: Tue, 12 Jan 2021 18:01:39 +0100 [thread overview]
Message-ID: <20210112170411.187513575@linutronix.de> (raw)
In-Reply-To: 20210112170136.078559026@linutronix.de
set_pte_at() on MIPS invokes update_cache() which might recurse into
kmap_local(). Use set_pte() like the original MIPS highmem implementation
did.
Fixes: a4c33e83bca1 ("mips/mm/highmem: Switch to generic kmap atomic")
Reported-by: Paul Cercueil <paul@crapouillou.net>
Reported-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/mips/include/asm/highmem.h | 1 +
1 file changed, 1 insertion(+)
--- a/arch/mips/include/asm/highmem.h
+++ b/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)
next prev parent reply other threads:[~2021-01-12 17:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-12 17:01 [patch 0/4] mm/highmem: Fix fallout from generic kmap_local conversions Thomas Gleixner
2021-01-12 17:01 ` [patch 1/4] sparc/mm/highmem: Flush cache and TLB Thomas Gleixner
2021-01-13 7:44 ` Andreas Larsson
2021-01-12 17:01 ` [patch 2/4] mm/highmem: Prepare for overriding set_pte_at() Thomas Gleixner
2021-01-12 17:01 ` Thomas Gleixner [this message]
2021-01-13 10:59 ` [patch 3/4] mips/mm/highmem: Use set_pte() for kmap_local() Thomas Bogendoerfer
2021-01-12 17:01 ` [patch 4/4] powerpc/mm/highmem: Use __set_pte_at() " Thomas Gleixner
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