diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2017-05-20 11:43:26 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-06-12 16:26:00 +0200 |
| commit | cc18b460dc72fc9020edcd617b3c4b23a577ee19 (patch) | |
| tree | c6fcaadc02d7ed8876fc343f83534cca6464eeae /arch/s390/include | |
| parent | f96c6f72bc792e7add27e40ec859a8f5ea72e72b (diff) | |
s390/mm: add p?d_folded() helper functions
Introduce and use p?d_folded() functions to clarify the page table
code a bit more.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/pgtable.h | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 6f8a67a103be..57057fb1cc07 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -563,18 +563,23 @@ static inline void crdte(unsigned long old, unsigned long new, } /* - * pgd/pmd/pte query functions + * pgd/p4d/pud/pmd/pte query functions */ +static inline int pgd_folded(pgd_t pgd) +{ + return (pgd_val(pgd) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R1; +} + static inline int pgd_present(pgd_t pgd) { - if ((pgd_val(pgd) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R1) + if (pgd_folded(pgd)) return 1; return (pgd_val(pgd) & _REGION_ENTRY_ORIGIN) != 0UL; } static inline int pgd_none(pgd_t pgd) { - if ((pgd_val(pgd) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R1) + if (pgd_folded(pgd)) return 0; return (pgd_val(pgd) & _REGION_ENTRY_INVALID) != 0UL; } @@ -592,16 +597,21 @@ static inline int pgd_bad(pgd_t pgd) return (pgd_val(pgd) & mask) != 0; } +static inline int p4d_folded(p4d_t p4d) +{ + return (p4d_val(p4d) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R2; +} + static inline int p4d_present(p4d_t p4d) { - if ((p4d_val(p4d) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R2) + if (p4d_folded(p4d)) return 1; return (p4d_val(p4d) & _REGION_ENTRY_ORIGIN) != 0UL; } static inline int p4d_none(p4d_t p4d) { - if ((p4d_val(p4d) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R2) + if (p4d_folded(p4d)) return 0; return p4d_val(p4d) == _REGION2_ENTRY_EMPTY; } @@ -614,16 +624,21 @@ static inline unsigned long p4d_pfn(p4d_t p4d) return (p4d_val(p4d) & origin_mask) >> PAGE_SHIFT; } +static inline int pud_folded(pud_t pud) +{ + return (pud_val(pud) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R3; +} + static inline int pud_present(pud_t pud) { - if ((pud_val(pud) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R3) + if (pud_folded(pud)) return 1; return (pud_val(pud) & _REGION_ENTRY_ORIGIN) != 0UL; } static inline int pud_none(pud_t pud) { - if ((pud_val(pud) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R3) + if (pud_folded(pud)) return 0; return pud_val(pud) == _REGION3_ENTRY_EMPTY; } |