[PATCH 0/3] mm: Fix bug affecting swapping in MTE tagged pages

Peter Collingbourne
2023-05-12T23:58:49Z

This patch series reworks the logic that handles swapping in page
metadata to fix a reported bug [1] where metadata can sometimes not
be swapped in correctly after commit c145e0b47c77 ("mm: streamline COW
logic in do_swap_page()").

[1] https://lore.kernel.org/all/5050805753ac469e8d727c797c2218a9d780d434.camel@mediatek.com/

Peter Collingbourne (3):
mm: Move arch_do_swap_page() call to before swap_free()
mm: Call arch_swap_restore() from arch_do_swap_page() and deprecate
the latter
arm64: mte: Simplify swap tag restoration logic and fix uninitialized
tag issue

arch/arm64/include/asm/mte.h | 4 ++--
arch/arm64/include/asm/pgtable.h | 14 ++------------
arch/arm64/kernel/mte.c | 32 +++-----------------------------
arch/arm64/mm/mteswap.c | 7 +++----
include/linux/pgtable.h | 26 +++++++++++++-------------
mm/memory.c | 26 +++++++++++++-------------
6 files changed, 36 insertions(+), 73 deletions(-)

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2.40.1.606.ga4b1b128d6-goog