From: Muchun Song <songmuchun@xxxxxxxxxxxxx> Subject: mm: memcontrol: remove the pgdata parameter of mem_cgroup_page_lruvec All the callers of mem_cgroup_page_lruvec() just pass page_pgdat(page) as the 2nd parameter to it (except isolate_migratepages_block()). But for isolate_migratepages_block(), the page_pgdat(page) is also equal to the local variable of @pgdat. So mem_cgroup_page_lruvec() do not need the pgdat parameter. Just remove it to simplify the code. Link: https://lkml.kernel.org/r/20210417043538.9793-4-songmuchun@xxxxxxxxxxxxx Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx> Reviewed-by: Shakeel Butt <shakeelb@xxxxxxxxxx> Acked-by: Roman Gushchin <guro@xxxxxx> Acked-by: Michal Hocko <mhocko@xxxxxxxx> Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx> Cc: Xiongchun Duan <duanxiongchun@xxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/memcontrol.h | 10 +++++----- mm/compaction.c | 2 +- mm/memcontrol.c | 9 +++------ mm/swap.c | 2 +- mm/workingset.c | 2 +- 5 files changed, 11 insertions(+), 14 deletions(-) --- a/include/linux/memcontrol.h~mm-memcontrol-remove-the-pgdata-parameter-of-mem_cgroup_page_lruvec +++ a/include/linux/memcontrol.h @@ -743,13 +743,12 @@ out: /** * mem_cgroup_page_lruvec - return lruvec for isolating/putting an LRU page * @page: the page - * @pgdat: pgdat of the page * * This function relies on page->mem_cgroup being stable. */ -static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, - struct pglist_data *pgdat) +static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page) { + pg_data_t *pgdat = page_pgdat(page); struct mem_cgroup *memcg = page_memcg(page); VM_WARN_ON_ONCE_PAGE(!memcg && !mem_cgroup_disabled(), page); @@ -1221,9 +1220,10 @@ static inline struct lruvec *mem_cgroup_ return &pgdat->__lruvec; } -static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, - struct pglist_data *pgdat) +static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page) { + pg_data_t *pgdat = page_pgdat(page); + return &pgdat->__lruvec; } --- a/mm/compaction.c~mm-memcontrol-remove-the-pgdata-parameter-of-mem_cgroup_page_lruvec +++ a/mm/compaction.c @@ -1028,7 +1028,7 @@ isolate_migratepages_block(struct compac if (!TestClearPageLRU(page)) goto isolate_fail_put; - lruvec = mem_cgroup_page_lruvec(page, pgdat); + lruvec = mem_cgroup_page_lruvec(page); /* If we already hold the lock, we can skip some rechecking */ if (lruvec != locked) { --- a/mm/memcontrol.c~mm-memcontrol-remove-the-pgdata-parameter-of-mem_cgroup_page_lruvec +++ a/mm/memcontrol.c @@ -1199,9 +1199,8 @@ void lruvec_memcg_debug(struct lruvec *l struct lruvec *lock_page_lruvec(struct page *page) { struct lruvec *lruvec; - struct pglist_data *pgdat = page_pgdat(page); - lruvec = mem_cgroup_page_lruvec(page, pgdat); + lruvec = mem_cgroup_page_lruvec(page); spin_lock(&lruvec->lru_lock); lruvec_memcg_debug(lruvec, page); @@ -1212,9 +1211,8 @@ struct lruvec *lock_page_lruvec(struct p struct lruvec *lock_page_lruvec_irq(struct page *page) { struct lruvec *lruvec; - struct pglist_data *pgdat = page_pgdat(page); - lruvec = mem_cgroup_page_lruvec(page, pgdat); + lruvec = mem_cgroup_page_lruvec(page); spin_lock_irq(&lruvec->lru_lock); lruvec_memcg_debug(lruvec, page); @@ -1225,9 +1223,8 @@ struct lruvec *lock_page_lruvec_irq(stru struct lruvec *lock_page_lruvec_irqsave(struct page *page, unsigned long *flags) { struct lruvec *lruvec; - struct pglist_data *pgdat = page_pgdat(page); - lruvec = mem_cgroup_page_lruvec(page, pgdat); + lruvec = mem_cgroup_page_lruvec(page); spin_lock_irqsave(&lruvec->lru_lock, *flags); lruvec_memcg_debug(lruvec, page); --- a/mm/swap.c~mm-memcontrol-remove-the-pgdata-parameter-of-mem_cgroup_page_lruvec +++ a/mm/swap.c @@ -313,7 +313,7 @@ void lru_note_cost(struct lruvec *lruvec void lru_note_cost_page(struct page *page) { - lru_note_cost(mem_cgroup_page_lruvec(page, page_pgdat(page)), + lru_note_cost(mem_cgroup_page_lruvec(page), page_is_file_lru(page), thp_nr_pages(page)); } --- a/mm/workingset.c~mm-memcontrol-remove-the-pgdata-parameter-of-mem_cgroup_page_lruvec +++ a/mm/workingset.c @@ -408,7 +408,7 @@ void workingset_activation(struct page * memcg = page_memcg_rcu(page); if (!mem_cgroup_disabled() && !memcg) goto out; - lruvec = mem_cgroup_page_lruvec(page, page_pgdat(page)); + lruvec = mem_cgroup_page_lruvec(page); workingset_age_nonresident(lruvec, thp_nr_pages(page)); out: rcu_read_unlock(); _
