linux-kernel - [PATCH] mm: RIP put_page_unless

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Date:	Thu, 9 Jul 2015 14:23:30 +0530
From:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Vineet Gupta <Vineet.Gupta1@...opsys.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Cyrill Gorcunov <gorcunov@...nvz.org>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH] mm: RIP put_page_unless_one() as it has no callers

Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc: Andrea Arcangeli <aarcange@...hat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@....com>
Cc: Cyrill Gorcunov <gorcunov@...nvz.org>
Cc: linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
---
 include/linux/mm.h | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7f471789781a..8d835cbe48fc 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -358,18 +358,6 @@ static inline int get_page_unless_zero(struct page *page)
 	return atomic_inc_not_zero(&page->_count);
 }
 
-/*
- * Try to drop a ref unless the page has a refcount of one, return false if
- * that is the case.
- * This is to make sure that the refcount won't become zero after this drop.
- * This can be called when MMU is off so it must not access
- * any of the virtual mappings.
- */
-static inline int put_page_unless_one(struct page *page)
-{
-	return atomic_add_unless(&page->_count, -1, 1);
-}
-
 extern int page_is_ram(unsigned long pfn);
 extern int region_is_ram(resource_size_t phys_addr, unsigned long size);
 
-- 
1.9.1

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