[PATCH v16 02/25] arc: mm: Add p?d_leaf() definitions
From: Steven Price <steven.price@arm.com>
Date: 2019-12-06 13:53:52
Also in:
linux-mm, lkml
Subsystem:
synopsys arc architecture, the rest · Maintainers:
Vineet Gupta, Linus Torvalds
walk_page_range() is going to be allowed to walk page tables other than those of user space. For this it needs to know when it has reached a 'leaf' entry in the page tables. This information will be provided by the p?d_leaf() functions/macros. For arc, we only have two levels, so only pmd_leaf() is needed. CC: Vineet Gupta <redacted> CC: linux-snps-arc@lists.infradead.org Acked-by: Vineet Gupta <redacted> Signed-off-by: Steven Price <steven.price@arm.com> --- arch/arc/include/asm/pgtable.h | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtable.h
index 9019ed9f9c94..12be7e1b7cc0 100644
--- a/arch/arc/include/asm/pgtable.h
+++ b/arch/arc/include/asm/pgtable.h@@ -273,6 +273,7 @@ static inline void pmd_set(pmd_t *pmdp, pte_t *ptep) #define pmd_none(x) (!pmd_val(x)) #define pmd_bad(x) ((pmd_val(x) & ~PAGE_MASK)) #define pmd_present(x) (pmd_val(x)) +#define pmd_leaf(x) (pmd_val(x) & _PAGE_HW_SZ) #define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0) #define pte_page(pte) pfn_to_page(pte_pfn(pte))
--
2.20.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel