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[PATCHv3 07/11] s390/mm: Modify pmdp_invalidate to return old value.

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  [PATCHv3 07/11] s390/mm: Modify pmdp_invalidate to return old value. "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2017-09-12 17:50 +0200

#1730965 — [PATCHv3 07/11] s390/mm: Modify pmdp_invalidate to return old value.

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

It's required to avoid loosing 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 | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index dce708e061ea..d3de8ddc55ec 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -1504,10 +1504,11 @@ 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)
 {
-	pmdp_xchg_direct(vma->vm_mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_EMPTY));
+	return pmdp_xchg_direct(vma->vm_mm, addr, pmdp,
+			__pmd(_SEGMENT_ENTRY_EMPTY));
 }
 
 #define __HAVE_ARCH_PMDP_SET_WRPROTECT
-- 
2.14.1

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