mm/vmscan: remove unused lru_pages argument

Since 9092c71bb724 ("mm: use sc->priority for slab shrink targets") the
argument 'unsigned long *lru_pages' passed around with no purpose.  Remove
it.

Link: http://lkml.kernel.org/r/20190228083329.31892-4-aryabinin@virtuozzo.com
Change-Id: I8a61dd9dab063e9db2d58aafe71f5a6238a3a525
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: William Kucharski <william.kucharski@oracle.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[backport of the commit c42875e38b6fb9546f665a397b66e3a4cc2e5041 from mainline]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 7fde5f9..adacd65 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2302,8 +2302,7 @@ enum scan_balance {
  * nr[2] = file inactive pages to scan; nr[3] = file active pages to scan
  */
 static void get_scan_count(struct lruvec *lruvec, struct mem_cgroup *memcg,
-                          struct scan_control *sc, unsigned long *nr,
-                          unsigned long *lru_pages)
+                          struct scan_control *sc, unsigned long *nr)
 {
        int swappiness = mem_cgroup_swappiness(memcg);
        struct zone_reclaim_stat *reclaim_stat = &lruvec->reclaim_stat;
@@ -2454,7 +2453,6 @@ static void get_scan_count(struct lruvec *lruvec, struct mem_cgroup *memcg,
        fraction[1] = fp;
        denominator = ap + fp + 1;
 out:
-       *lru_pages = 0;
        for_each_evictable_lru(lru) {
                int file = is_file_lru(lru);
                unsigned long lruvec_size;
@@ -2552,7 +2550,6 @@ out:
                        BUG();
                }
 
-               *lru_pages += lruvec_size;
                nr[lru] = scan;
        }
 }
@@ -2561,7 +2558,7 @@ out:
  * This is a basic per-node page freer.  Used by both kswapd and direct reclaim.
  */
 static void shrink_node_memcg(struct pglist_data *pgdat, struct mem_cgroup *memcg,
-                             struct scan_control *sc, unsigned long *lru_pages)
+                             struct scan_control *sc)
 {
        struct lruvec *lruvec = mem_cgroup_lruvec(pgdat, memcg);
        unsigned long nr[NR_LRU_LISTS];
@@ -2573,7 +2570,7 @@ static void shrink_node_memcg(struct pglist_data *pgdat, struct mem_cgroup *memc
        struct blk_plug plug;
        bool scan_adjusted;
 
-       get_scan_count(lruvec, memcg, sc, nr, lru_pages);
+       get_scan_count(lruvec, memcg, sc, nr);
 
        /* Record the original scan target for proportional adjustments later */
        memcpy(targets, nr, sizeof(nr));
@@ -2761,7 +2758,6 @@ static bool shrink_node(pg_data_t *pgdat, struct scan_control *sc)
 
        do {
                struct mem_cgroup *root = sc->target_mem_cgroup;
-               unsigned long node_lru_pages = 0;
                struct mem_cgroup *memcg;
 
                memset(&sc->nr, 0, sizeof(sc->nr));
@@ -2771,7 +2767,6 @@ static bool shrink_node(pg_data_t *pgdat, struct scan_control *sc)
 
                memcg = mem_cgroup_iter(root, NULL, NULL);
                do {
-                       unsigned long lru_pages;
                        unsigned long reclaimed;
                        unsigned long scanned;
 
@@ -2808,8 +2803,7 @@ static bool shrink_node(pg_data_t *pgdat, struct scan_control *sc)
 
                        reclaimed = sc->nr_reclaimed;
                        scanned = sc->nr_scanned;
-                       shrink_node_memcg(pgdat, memcg, sc, &lru_pages);
-                       node_lru_pages += lru_pages;
+                       shrink_node_memcg(pgdat, memcg, sc);
 
                        shrink_slab(sc->gfp_mask, pgdat->node_id, memcg,
                                        sc->priority);
@@ -3320,7 +3314,6 @@ unsigned long mem_cgroup_shrink_node(struct mem_cgroup *memcg,
                .reclaim_idx = MAX_NR_ZONES - 1,
                .may_swap = !noswap,
        };
-       unsigned long lru_pages;
 
        WARN_ON_ONCE(!current->reclaim_state);
 
@@ -3337,7 +3330,7 @@ unsigned long mem_cgroup_shrink_node(struct mem_cgroup *memcg,
         * will pick up pages from other mem cgroup's as well. We hack
         * the priority and make it zero.
         */
-       shrink_node_memcg(pgdat, memcg, &sc, &lru_pages);
+       shrink_node_memcg(pgdat, memcg, &sc);
 
        trace_mm_vmscan_memcg_softlimit_reclaim_end(sc.nr_reclaimed);