[PATCHv4 07/12] s390/mm: Modify pmdp_invalidate to return old value.

Kirill A. Shutemov
2017-12-13T10:57:51Z

From: Martin Schwidefsky <schwidefsky@de.ibm.com>

It's required to avoid losing dirty and accessed bits.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
arch/s390/include/asm/pgtable.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 57d7bc92e0b8..4c72c55828c1 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -1511,12 +1511,12 @@ static inline pmd_t pmdp_huge_clear_flush(struct vm_area_struct *vma,
}

#define __HAVE_ARCH_PMDP_INVALIDATE
-static inline void pmdp_invalidate(struct vm_area_struct *vma,
+static inline pmd_t pmdp_invalidate(struct vm_area_struct *vma,
unsigned long addr, pmd_t *pmdp)
{
pmd_t pmd = __pmd(pmd_val(*pmdp) | _SEGMENT_ENTRY_INVALID);

- pmdp_xchg_direct(vma->vm_mm, addr, pmdp, pmd);
+ return pmdp_xchg_direct(vma->vm_mm, addr, pmdp, pmd);
}

#define __HAVE_ARCH_PMDP_SET_WRPROTECT
--
2.15.0

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