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authorSteven Price <[email protected]>2020-02-03 17:35:06 -0800
committerLinus Torvalds <[email protected]>2020-02-04 03:05:24 +0000
commit4f6b2c083c86c7b13cb7900e7d3a6f18e38ba724 (patch)
tree9682902213480a4ed30b69311dc75e3abc0f5490
parent93fab1b22ef7c4abcbc760ce4432762b02e7f3d1 (diff)
arc: mm: add p?d_leaf() definitions
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. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Steven Price <[email protected]> Acked-by: Vineet Gupta <[email protected]> Cc: Albert Ou <[email protected]> Cc: Alexandre Ghiti <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Ard Biesheuvel <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Christian Borntraeger <[email protected]> Cc: Dave Hansen <[email protected]> Cc: David S. Miller <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: James Hogan <[email protected]> Cc: James Morse <[email protected]> Cc: Jerome Glisse <[email protected]> Cc: "Liang, Kan" <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Paul Burton <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Paul Walmsley <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: Russell King <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Will Deacon <[email protected]> Cc: Zong Li <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
-rw-r--r--arch/arc/include/asm/pgtable.h1
1 files changed, 1 insertions, 0 deletions
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))