[PATCH] mm/vmscan: remove prefetch_prev_lru_page

[Alex Shi]

This macro are never used in git history. So better to remove.

Signed-off-by: Alex Shi <alex.shi@xxxxxxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> 
Cc: linux-mm@xxxxxxxxx 
Cc: linux-kernel@xxxxxxxxxxxxxxx 
---
 mm/vmscan.c | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 4e699ed3501e..033e7145061b 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -146,20 +146,6 @@ struct scan_control {
 	struct reclaim_state reclaim_state;
 };
 
-#ifdef ARCH_HAS_PREFETCH
-#define prefetch_prev_lru_page(_page, _base, _field)			\
-	do {								\
-		if ((_page)->lru.prev != _base) {			\
-			struct page *prev;				\
-									\
-			prev = lru_to_page(&(_page->lru));		\
-			prefetch(&prev->_field);			\
-		}							\
-	} while (0)
-#else
-#define prefetch_prev_lru_page(_page, _base, _field) do { } while (0)
-#endif
-
 #ifdef ARCH_HAS_PREFETCHW
 #define prefetchw_prev_lru_page(_page, _base, _field)			\
 	do {								\
-- 
1.8.3.1