[patch 031/158] mm/mmap.c: __vma_unlink_prev() is not necessary now

[patch 031/158] mm/mmap.c: __vma_unlink_prev() is not necessary now

[akpm]

From: Wei Yang <richardw.yang@linux.intel.com>
Subject: mm/mmap.c: __vma_unlink_prev() is not necessary now

The third parameter of __vma_unlink_common() could differentiate these two
types.  __vma_unlink_prev() is not necessary now.

Link: http://lkml.kernel.org/r/20191006012636.31521-2-richardw.yang@linux.intel.com
Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>

Cc: Christoph Hellwig <hch@infradead.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/mmap.c |    9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

--- a/mm/mmap.c~mm-mmapc-__vma_unlink_prev-is-not-necessary-now
+++ a/mm/mmap.c
@@ -702,13 +702,6 @@ static __always_inline void __vma_unlink
 	vmacache_invalidate(mm);
 }
 
-static inline void __vma_unlink_prev(struct mm_struct *mm,
-				     struct vm_area_struct *vma,
-				     struct vm_area_struct *prev)
-{
-	__vma_unlink_common(mm, vma, vma);
-}
-
 /*
  * We cannot adjust vm_start, vm_end, vm_pgoff fields of a vma that
  * is already present in an i_mmap tree without adjusting the tree.
@@ -881,7 +874,7 @@ again:
 		 * us to remove next before dropping the locks.
 		 */
 		if (remove_next != 3)
-			__vma_unlink_prev(mm, next, vma);
+			__vma_unlink_common(mm, next, next);
 		else
 			/*
 			 * vma is not before next if they've been
_