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authorLinus Torvalds <torvalds@linux-foundation.org>2022-10-14 22:38:03 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-10-14 22:38:03 +0300
commit1df046ab1c6520911774911f8c710ca8e981305c (patch)
tree6ce36362f860a15fecb85df729578dacdab30862 /arch/arm64/mm
parent5e714bf1713b4b096d20ec75c13880b7086964bd (diff)
parent0e5d5ae837c8ce04d2ddb874ec5f920118bd9d31 (diff)
downloadlinux-1df046ab1c6520911774911f8c710ca8e981305c.tar.xz
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas: - Cortex-A55 errata workaround (repeat TLBI) - AMPERE1 added to the Spectre-BHB affected list - MTE fix to avoid setting PG_mte_tagged if no tags have been touched on a page - Fixed typo in the SCTLR_EL1.SPINTMASK bit naming (the commit log has other typos) - perf: return value check in ali_drw_pmu_probe(), ALIBABA_UNCORE_DRW_PMU dependency on ACPI * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: Add AMPERE1 to the Spectre-BHB affected list arm64: mte: Avoid setting PG_mte_tagged if no tags cleared or restored MAINTAINERS: rectify file entry in ALIBABA PMU DRIVER drivers/perf: ALIBABA_UNCORE_DRW_PMU should depend on ACPI drivers/perf: fix return value check in ali_drw_pmu_probe() arm64: errata: Add Cortex-A55 to the repeat tlbi list arm64/sysreg: Fix typo in SCTR_EL1.SPINTMASK
Diffstat (limited to 'arch/arm64/mm')
-rw-r--r--arch/arm64/mm/mteswap.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm64/mm/mteswap.c b/arch/arm64/mm/mteswap.c
index 4334dec93bd4..bed803d8e158 100644
--- a/arch/arm64/mm/mteswap.c
+++ b/arch/arm64/mm/mteswap.c
@@ -53,7 +53,12 @@ bool mte_restore_tags(swp_entry_t entry, struct page *page)
if (!tags)
return false;
- mte_restore_page_tags(page_address(page), tags);
+ /*
+ * Test PG_mte_tagged again in case it was racing with another
+ * set_pte_at().
+ */
+ if (!test_and_set_bit(PG_mte_tagged, &page->flags))
+ mte_restore_page_tags(page_address(page), tags);
return true;
}