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arm64: mm: Always make sw-dirty PTEs hw-dirty in pte_modify
[platform/kernel/linux-starfive.git]
/
arch
/
arm64
/
include
/
asm
/
pgtable.h
diff --git
a/arch/arm64/include/asm/pgtable.h
b/arch/arm64/include/asm/pgtable.h
index
7f7d9b1
..
07bdf5d
100644
(file)
--- a/
arch/arm64/include/asm/pgtable.h
+++ b/
arch/arm64/include/asm/pgtable.h
@@
-826,6
+826,12
@@
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
pte = set_pte_bit(pte, __pgprot(PTE_DIRTY));
pte_val(pte) = (pte_val(pte) & ~mask) | (pgprot_val(newprot) & mask);
pte = set_pte_bit(pte, __pgprot(PTE_DIRTY));
pte_val(pte) = (pte_val(pte) & ~mask) | (pgprot_val(newprot) & mask);
+ /*
+ * If we end up clearing hw dirtiness for a sw-dirty PTE, set hardware
+ * dirtiness again.
+ */
+ if (pte_sw_dirty(pte))
+ pte = pte_mkdirty(pte);
return pte;
}
return pte;
}