The patch titled
Subject: mm: add generic p?d_leaf() macros
has been added to the -mm tree. Its filename is
mm-add-generic-pd_leaf-macros.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-add-generic-pd_leaf-macros.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-add-generic-pd_leaf-macros.patch
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------------------------------------------------------
From: Steven Price <steven.price@xxxxxxx>
Subject: mm: add generic p?d_leaf() macros
Exposing the pud/pgd levels of the page tables to walk_page_range() means
we may come across the exotic large mappings that come with large areas of
contiguous memory (such as the kernel's linear map).
For architectures that don't provide all p?d_leaf() macros, provide
generic do nothing default that are suitable where there cannot be leaf
pages that that level.
Link: http://lkml.kernel.org/r/20190722154210.42799-11-steven.price@xxxxxxx
Signed-off-by: Steven Price <steven.price@xxxxxxx>
Cc: Albert Ou <aou@xxxxxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: James Hogan <jhogan@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxx>
Cc: Paul Burton <paul.burton@xxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Vineet Gupta <vgupta@xxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/asm-generic/pgtable.h | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
--- a/include/asm-generic/pgtable.h~mm-add-generic-pd_leaf-macros
+++ a/include/asm-generic/pgtable.h
@@ -1188,4 +1188,23 @@ static inline bool arch_has_pfn_modify_c
#define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED)
#endif
+/*
+ * p?d_leaf() - true if this entry is a final mapping to a physical address.
+ * This differs from p?d_huge() by the fact that they are always available (if
+ * the architecture supports large pages at the appropriate level) even
+ * if CONFIG_HUGETLB_PAGE is not defined.
+ */
+#ifndef pgd_leaf
+#define pgd_leaf(x) 0
+#endif
+#ifndef p4d_leaf
+#define p4d_leaf(x) 0
+#endif
+#ifndef pud_leaf
+#define pud_leaf(x) 0
+#endif
+#ifndef pmd_leaf
+#define pmd_leaf(x) 0
+#endif
+
#endif /* _ASM_GENERIC_PGTABLE_H */
_
Patches currently in -mm which might be from steven.price@xxxxxxx are
arc-mm-add-pd_leaf-definitions.patch
arm-mm-add-pd_leaf-definitions.patch
arm64-mm-add-pd_leaf-definitions.patch
mips-mm-add-pd_leaf-definitions.patch
powerpc-mm-add-pd_leaf-definitions.patch
riscv-mm-add-pd_leaf-definitions.patch
s390-mm-add-pd_leaf-definitions.patch
sparc-mm-add-pd_leaf-definitions.patch
x86-mm-add-pd_leaf-definitions.patch
mm-add-generic-pd_leaf-macros.patch
mm-pagewalk-add-p4d_entry-and-pgd_entry.patch
mm-pagewalk-allow-walking-without-vma.patch
mm-pagewalk-add-test_pd-callbacks.patch
x86-mm-dont-display-pages-which-arent-present-in-debugfs.patch
x86-mm-point-to-struct-seq_file-from-struct-pg_state.patch
x86-mmefi-convert-ptdump_walk_pgd_level-to-take-a-mm_struct.patch
x86-mm-convert-ptdump_walk_pgd_level_debugfs-to-take-an-mm_struct.patch
x86-mm-convert-ptdump_walk_pgd_level_core-to-take-an-mm_struct.patch
mm-add-generic-ptdump.patch
x86-mm-convert-dump_pagetables-to-use-walk_page_range.patch
arm64-mm-convert-mm-dumpc-to-use-walk_page_range.patch
