Prepare for keeping a PMD-mapped anonymous THP mapped by a PMD across the swap round-trip, which makes PG_anon_exclusive have to survive in a swap PMD and not just in a swap PTE.
book3s64 builds a swap PMD by running the PTE encoding over pmd_pte(), so the PMD helpers wrap the PTE ones and reuse _PAGE_SWP_EXCLUSIVE, exactly as the soft-dirty PMD helpers next to them do. It is also the only powerpc variant that selects ARCH_HAS_PMD_SOFTLEAVES, via PPC_THP. Cc: Madhavan Srinivasan <[email protected]> Signed-off-by: Usama Arif <[email protected]> Cc: [email protected] --- arch/powerpc/include/asm/book3s/64/pgtable.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h index dff8790a047db..458c85cebfa65 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h @@ -1060,6 +1060,12 @@ static inline pte_t *pmdp_ptep(pmd_t *pmd) #endif #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ +#ifdef CONFIG_ARCH_HAS_PMD_SOFTLEAVES +#define pmd_swp_mkexclusive(pmd) pte_pmd(pte_swp_mkexclusive(pmd_pte(pmd))) +#define pmd_swp_exclusive(pmd) pte_swp_exclusive(pmd_pte(pmd)) +#define pmd_swp_clear_exclusive(pmd) pte_pmd(pte_swp_clear_exclusive(pmd_pte(pmd))) +#endif + #ifdef CONFIG_ARCH_HAS_PTE_PROTNONE static inline int pmd_protnone(pmd_t pmd) { -- 2.53.0-Meta
