linux-kernel - [PATCH 2/2] mm/ksm: move [set_]page_stable

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Message-Id: <1524552106-7356-3-git-send-email-rppt@linux.vnet.ibm.com>
Date:   Tue, 24 Apr 2018 09:41:46 +0300
From:   Mike Rapoport <rppt@...ux.vnet.ibm.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Andrea Arcangeli <aarcange@...hat.com>,
        linux-mm <linux-mm@...ck.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>
Subject: [PATCH 2/2] mm/ksm: move [set_]page_stable_node from ksm.h to ksm.c

The page_stable_node() and set_page_stable_node() are only used in mm/ksm.c
and there is no point to keep them in the include/linux/ksm.h

Signed-off-by: Mike Rapoport <rppt@...ux.vnet.ibm.com>
---
 include/linux/ksm.h | 11 -----------
 mm/ksm.c            | 12 ++++++++++++
 2 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/include/linux/ksm.h b/include/linux/ksm.h
index bbdfca3..161e816 100644
--- a/include/linux/ksm.h
+++ b/include/linux/ksm.h
@@ -37,17 +37,6 @@ static inline void ksm_exit(struct mm_struct *mm)
 		__ksm_exit(mm);
 }
 
-static inline struct stable_node *page_stable_node(struct page *page)
-{
-	return PageKsm(page) ? page_rmapping(page) : NULL;
-}
-
-static inline void set_page_stable_node(struct page *page,
-					struct stable_node *stable_node)
-{
-	page->mapping = (void *)((unsigned long)stable_node | PAGE_MAPPING_KSM);
-}
-
 /*
  * When do_swap_page() first faults in from swap what used to be a KSM page,
  * no problem, it will be assigned to this vma's anon_vma; but thereafter,
diff --git a/mm/ksm.c b/mm/ksm.c
index 16451a2..58c2741 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -827,6 +827,18 @@ static int unmerge_ksm_pages(struct vm_area_struct *vma,
 /*
  * Only called through the sysfs control interface:
  */
+
+static inline struct stable_node *page_stable_node(struct page *page)
+{
+	return PageKsm(page) ? page_rmapping(page) : NULL;
+}
+
+static inline void set_page_stable_node(struct page *page,
+					struct stable_node *stable_node)
+{
+	page->mapping = (void *)((unsigned long)stable_node | PAGE_MAPPING_KSM);
+}
+
 static int remove_stable_node(struct stable_node *stable_node)
 {
 	struct page *page;
-- 
2.7.4