linux-kernel - [PATCH] mm/vmscan: remove prefetch_prev_lru

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Message-Id: <1579006500-127143-1-git-send-email-alex.shi@linux.alibaba.com>
Date:   Tue, 14 Jan 2020 20:55:00 +0800
From:   Alex Shi <alex.shi@...ux.alibaba.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Alex Shi <alex.shi@...ux.alibaba.com>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] mm/vmscan: remove prefetch_prev_lru_page

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

Signed-off-by: Alex Shi <alex.shi@...ux.alibaba.com>
Cc: Andrew Morton <akpm@...ux-foundation.org> 
Cc: linux-mm@...ck.org 
Cc: linux-kernel@...r.kernel.org 
---
 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