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authorChristian Borntraeger <borntraeger@de.ibm.com>2013-06-05 09:22:33 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-06-05 17:36:20 +0200
commit3a82603be4f5523ce21dd468a323aa36ff845f6d (patch)
tree3b73b3c0bcdbadc30448f69705eac93be19444fc /arch/s390/include/asm/pgtable.h
parent9cc5c206d9b44b7763aab3082a5be72c78a3ef7a (diff)
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>
Diffstat (limited to 'arch/s390/include/asm/pgtable.h')
-rw-r--r--arch/s390/include/asm/pgtable.h11
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 391e592356d..f9a0a70dc93 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -640,6 +640,13 @@ static inline void pgste_set_unlock(pte_t *ptep, pgste_t pgste)
#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)
{
#ifdef CONFIG_PGSTE
@@ -1101,8 +1108,10 @@ static inline pte_t ptep_modify_prot_start(struct mm_struct *mm,
if (!mm_exclusive(mm))
__ptep_ipte(address, ptep);
- if (mm_has_pgste(mm))
+ if (mm_has_pgste(mm)) {
pgste = pgste_update_all(&pte, pgste);
+ pgste_set(ptep, pgste);
+ }
return pte;
}