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s390/pgtable: Save pgste during modify_prot_start/commit 

In modify_prot_start we update the pgste value but never store it back
into the original location. Lets save the calculated result, since
modify_prot_commit will use the value of the pgste.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Christian Borntraeger 2013-06-05 09:22:33 +02:00 committed by Martin Schwidefsky
parent 9cc5c206d9
commit 3a82603be4
1 changed files with 10 additions and 1 deletions
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11
arch/s390/include/asm/pgtable.h
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@ -640,6 +640,13 @@ static inline void pgste_set_unlock(pte_t *ptep, pgste_t pgste)
#endif #endif
} }
static inline void pgste_set(pte_t *ptep, pgste_t pgste)
{
#ifdef CONFIG_PGSTE
*(pgste_t *)(ptep + PTRS_PER_PTE) = pgste;
#endif
}
static inline pgste_t pgste_update_all(pte_t *ptep, pgste_t pgste) static inline pgste_t pgste_update_all(pte_t *ptep, pgste_t pgste)
{ {
#ifdef CONFIG_PGSTE #ifdef CONFIG_PGSTE
@ -1101,8 +1108,10 @@ static inline pte_t ptep_modify_prot_start(struct mm_struct *mm,
if (!mm_exclusive(mm)) if (!mm_exclusive(mm))
__ptep_ipte(address, ptep); __ptep_ipte(address, ptep);
if (mm_has_pgste(mm)) if (mm_has_pgste(mm)) {
pgste = pgste_update_all(&pte, pgste); pgste = pgste_update_all(&pte, pgste);
pgste_set(ptep, pgste);
}
return pte; return pte;
} }