linux-kernel - [PATCH v18 24/32] mm/pgdat: remove pgdat lru

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Message-Id: <1598273705-69124-25-git-send-email-alex.shi@linux.alibaba.com>
Date:   Mon, 24 Aug 2020 20:54:57 +0800
From:   Alex Shi <alex.shi@...ux.alibaba.com>
To:     akpm@...ux-foundation.org, mgorman@...hsingularity.net,
        tj@...nel.org, hughd@...gle.com, khlebnikov@...dex-team.ru,
        daniel.m.jordan@...cle.com, willy@...radead.org,
        hannes@...xchg.org, lkp@...el.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
        shakeelb@...gle.com, iamjoonsoo.kim@....com,
        richard.weiyang@...il.com, kirill@...temov.name,
        alexander.duyck@...il.com, rong.a.chen@...el.com, mhocko@...e.com,
        vdavydov.dev@...il.com, shy828301@...il.com
Subject: [PATCH v18 24/32] mm/pgdat: remove pgdat lru_lock

Now pgdat.lru_lock was replaced by lruvec lock. It's not used anymore.

Signed-off-by: Alex Shi <alex.shi@...ux.alibaba.com>
Reviewed-by: Alexander Duyck <alexander.h.duyck@...ux.intel.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Cc: Hugh Dickins <hughd@...gle.com>
Cc: Johannes Weiner <hannes@...xchg.org>
Cc: linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org
Cc: cgroups@...r.kernel.org
---
 include/linux/mmzone.h | 1 -
 mm/page_alloc.c        | 1 -
 2 files changed, 2 deletions(-)

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index f0596e634863..0ed520954843 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -758,7 +758,6 @@ struct deferred_split {
 
 	/* Write-intensive fields used by page reclaim */
 	ZONE_PADDING(_pad1_)
-	spinlock_t		lru_lock;
 
 #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
 	/*
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index fab5e97dc9ca..775120fcc869 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6733,7 +6733,6 @@ static void __meminit pgdat_init_internals(struct pglist_data *pgdat)
 	init_waitqueue_head(&pgdat->pfmemalloc_wait);
 
 	pgdat_page_ext_init(pgdat);
-	spin_lock_init(&pgdat->lru_lock);
 	lruvec_init(&pgdat->__lruvec);
 }
 
-- 
1.8.3.1