Messages in this thread Patch in this message | | | From | Steven Price <> | Subject | [PATCH v2 01/13] arm64: mm: Add p?d_large() definitions | Date | Thu, 21 Feb 2019 11:34:50 +0000 |
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From: James Morse <james.morse@arm.com>
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).
Expose p?d_large() from each architecture to detect these large mappings.
arm64 already has these macros defined, but with a different name. p?d_large() is used by s390, sparc and x86. Only arm/arm64 use p?d_sect(). Add a macro to allow both names.
Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Steven Price <steven.price@arm.com> --- arch/arm64/include/asm/pgtable.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index de70c1eabf33..09d308921625 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -428,6 +428,7 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, PMD_TYPE_TABLE) #define pmd_sect(pmd) ((pmd_val(pmd) & PMD_TYPE_MASK) == \ PMD_TYPE_SECT) +#define pmd_large(x) pmd_sect(x) #if defined(CONFIG_ARM64_64K_PAGES) || CONFIG_PGTABLE_LEVELS < 3 #define pud_sect(pud) (0) @@ -435,6 +436,7 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, #else #define pud_sect(pud) ((pud_val(pud) & PUD_TYPE_MASK) == \ PUD_TYPE_SECT) +#define pud_large(x) pud_sect(x) #define pud_table(pud) ((pud_val(pud) & PUD_TYPE_MASK) == \ PUD_TYPE_TABLE) #endif -- 2.20.1
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