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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-07-19 09:15:54 (GMT) |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-08-22 10:20:07 (GMT) |
| commit | d56c893d36678f7ec8552f22ec12793a82ff8ee6 (patch) | |
| tree | dfad218dc96f8d19c72e419af50fa9fd8e687533 | |
| parent | a055f66a3a099e2c886a53421405f98683e94b2b (diff) | |
| download | linux-d56c893d36678f7ec8552f22ec12793a82ff8ee6.tar.xz | |
s390/pgtable: add pgste_get helper
ptep_modify_prot_start uses the pgste_set helper to store the pgste,
while ptep_modify_prot_commit uses its own pointer magic to retrieve
the value again. Add the pgste_get help function to keep things
symmetrical and improve readability.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | arch/s390/include/asm/pgtable.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index b59b44b..26ee897 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -619,6 +619,15 @@ static inline void pgste_set_unlock(pte_t *ptep, pgste_t pgste) #endif } +static inline pgste_t pgste_get(pte_t *ptep) +{ + unsigned long pgste = 0; +#ifdef CONFIG_PGSTE + pgste = *(unsigned long *)(ptep + PTRS_PER_PTE); +#endif + return __pgste(pgste); +} + static inline void pgste_set(pte_t *ptep, pgste_t pgste) { #ifdef CONFIG_PGSTE @@ -1098,7 +1107,7 @@ static inline void ptep_modify_prot_commit(struct mm_struct *mm, pgste_t pgste; if (mm_has_pgste(mm)) { - pgste = *(pgste_t *)(ptep + PTRS_PER_PTE); + pgste = pgste_get(ptep); pgste_set_key(ptep, pgste, pte); pgste_set_pte(ptep, pte); pgste_set_unlock(ptep, pgste); |