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author | Heiko Carstens <hca@linux.ibm.com> | 2022-02-21 23:18:29 +0300 |
---|---|---|
committer | Vasily Gorbik <gor@linux.ibm.com> | 2022-03-01 23:05:10 +0300 |
commit | f29111f117aaafa2887e13923f6e88fc11f5e065 (patch) | |
tree | 8cbd2366d6c52dd3aca1270a17adb896b600683b | |
parent | e2aaae2d3677563c1bb6cd15fbddd701381823be (diff) | |
download | linux-f29111f117aaafa2887e13923f6e88fc11f5e065.tar.xz |
s390/mm: add set_pte_bit()/clear_pte_bit() helper functions
Add set_pte_bit()/clear_pte_bit() and set_pXd_bit()/clear_pXd_bit
helper functions which are supposed to be used if bits within
ptes/pXds are set/cleared.
The only point of these helper functions is to get more readable
code. This is quite similar to what arm64 has.
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
-rw-r--r-- | arch/s390/include/asm/pgtable.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 2aa8057c7ef8..4bbb6d38365f 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -538,6 +538,36 @@ static inline int mm_alloc_pgste(struct mm_struct *mm) return 0; } +static inline pte_t clear_pte_bit(pte_t pte, pgprot_t prot) +{ + return __pte(pte_val(pte) & ~pgprot_val(prot)); +} + +static inline pte_t set_pte_bit(pte_t pte, pgprot_t prot) +{ + return __pte(pte_val(pte) | pgprot_val(prot)); +} + +static inline pmd_t clear_pmd_bit(pmd_t pmd, pgprot_t prot) +{ + return __pmd(pmd_val(pmd) & ~pgprot_val(prot)); +} + +static inline pmd_t set_pmd_bit(pmd_t pmd, pgprot_t prot) +{ + return __pmd(pmd_val(pmd) | pgprot_val(prot)); +} + +static inline pud_t clear_pud_bit(pud_t pud, pgprot_t prot) +{ + return __pud(pud_val(pud) & ~pgprot_val(prot)); +} + +static inline pud_t set_pud_bit(pud_t pud, pgprot_t prot) +{ + return __pud(pud_val(pud) | pgprot_val(prot)); +} + /* * In the case that a guest uses storage keys * faults should no longer be backed by zero pages |