s390/mm: modify pmdp_invalidate to return old value.

It's required to avoid losing dirty and accessed bits. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Martin Schwidefsky <[email protected]> Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Vlastimil Babka <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: Michal Hocko <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
ferruhy · Feb 1, 2018 · 9c4563f · 9c4563f
1 parent 8cc931e
commit 9c4563f
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
@@ -1505,12 +1505,12 @@ 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