The patch titled
Subject: mips/mm/highmem: use set_pte() for kmap_local()
has been added to the -mm tree. Its filename is
mips-mm-highmem-use-set_pte-for-kmap_local.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mips-mm-highmem-use-set_pte-for-kmap_local.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mips-mm-highmem-use-set_pte-for-kmap_local.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx
Fixes: a4c33e83bca1 ("mips/mm/highmem: Switch to generic kmap atomic")
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reported-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
Reported-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Acked-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Cc: Andreas Larsson <andreas@xxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/mips/include/asm/highmem.h | 1 +
1 file changed, 1 insertion(+)
--- 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)
_
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
