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Diffstat (limited to 'mm/ksm.c')
-rw-r--r--mm/ksm.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/mm/ksm.c b/mm/ksm.c
index 5575f8628fef..e9501f833374 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -34,6 +34,7 @@
#include <linux/ksm.h>
#include <asm/tlbflush.h>
+#include "internal.h"
/*
* A few notes about the KSM scanning process,
@@ -767,15 +768,14 @@ static int try_to_merge_one_page(struct vm_area_struct *vma,
* ptes are necessarily already write-protected. But in either
* case, we need to lock and check page_count is not raised.
*/
- if (write_protect_page(vma, oldpage, &orig_pte)) {
- unlock_page(oldpage);
- goto out_putpage;
- }
- unlock_page(oldpage);
-
- if (pages_identical(oldpage, newpage))
+ if (write_protect_page(vma, oldpage, &orig_pte) == 0 &&
+ pages_identical(oldpage, newpage))
err = replace_page(vma, oldpage, newpage, orig_pte);
+ if ((vma->vm_flags & VM_LOCKED) && !err)
+ munlock_vma_page(oldpage);
+
+ unlock_page(oldpage);
out_putpage:
put_page(oldpage);
put_page(newpage);