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Commit d56c893d authored by Martin Schwidefsky's avatar Martin Schwidefsky
Browse files

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: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent a055f66a

arch/s390/include/asm/pgtable.h

+10 −1
Original line number Diff line number Diff line
@@ -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);