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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-10-15 11:25:57 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-11-02 10:31:53 +0300 |
| commit | 1071fc5779d9846fec56a4ff6089ab08cac1ab72 (patch) | |
| tree | 9e20a5fd7a7a2c993e89ef28497dd52f9974daae | |
| parent | a8874e7e8a8896f2b6c641f4b8e2473eafd35204 (diff) | |
| download | linux-1071fc5779d9846fec56a4ff6089ab08cac1ab72.tar.xz | |
mm: introduce mm_[p4d|pud|pmd]_folded
Add three architecture overrideable functions to test if the
p4d, pud, or pmd layer of a page table is folded or not.
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | include/asm-generic/pgtable.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index 88ebc6102c7c..15fd0277ffa6 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -1127,4 +1127,20 @@ static inline bool arch_has_pfn_modify_check(void) #endif #endif +/* + * On some architectures it depends on the mm if the p4d/pud or pmd + * layer of the page table hierarchy is folded or not. + */ +#ifndef mm_p4d_folded +#define mm_p4d_folded(mm) __is_defined(__PAGETABLE_P4D_FOLDED) +#endif + +#ifndef mm_pud_folded +#define mm_pud_folded(mm) __is_defined(__PAGETABLE_PUD_FOLDED) +#endif + +#ifndef mm_pmd_folded +#define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED) +#endif + #endif /* _ASM_GENERIC_PGTABLE_H */ |