mm: fold and remove lru_cache_add_anon() and lru_cache_add_file()

They're the same function, and for the purpose of all callers they are
equivalent to lru_cache_add().

[akpm@linux-foundation.org: fix it for local_lock changes]
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Rik van Riel <riel@surriel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Link: http://lkml.kernel.org/r/20200520232525.798933-5-hannes@cmpxchg.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

5 files changed, 17 insertions, 43 deletions

diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index f29038c485e0..3f032487825b 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -1879,13 +1879,9 @@ xa_unlocked:
 
 		SetPageUptodate(new_page);
 		page_ref_add(new_page, HPAGE_PMD_NR - 1);
-
-		if (is_shmem) {
+		if (is_shmem)
 			set_page_dirty(new_page);
-			lru_cache_add_anon(new_page);
-		} else {
-			lru_cache_add_file(new_page);
-		}
+		lru_cache_add(new_page);
 
 		/*
 		 * Remove pte page tables, so we can re-fault the page as huge.
diff --git a/mm/memory.c b/mm/memory.c
index d50d8b498af5..3431e76d0e75 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3139,7 +3139,7 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
 				if (err)
 					goto out_page;
 
-				lru_cache_add_anon(page);
+				lru_cache_add(page);
 				swap_readpage(page, true);
 			}
 		} else {
diff --git a/mm/shmem.c b/mm/shmem.c
index e83de27ce8f4..ea95a3e46fbb 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1609,7 +1609,7 @@ static int shmem_replace_page(struct page **pagep, gfp_t gfp,
 		 */
 		oldpage = newpage;
 	} else {
-		lru_cache_add_anon(newpage);
+		lru_cache_add(newpage);
 		*pagep = newpage;
 	}
 
@@ -1860,7 +1860,7 @@ alloc_nohuge:
 					charge_mm);
 	if (error)
 		goto unacct;
-	lru_cache_add_anon(page);
+	lru_cache_add(page);
 
 	spin_lock_irq(&info->lock);
 	info->alloced += compound_nr(page);
@@ -2376,7 +2376,7 @@ static int shmem_mfill_atomic_pte(struct mm_struct *dst_mm,
 	if (!pte_none(*dst_pte))
 		goto out_release_unlock;
 
-	lru_cache_add_anon(page);
+	lru_cache_add(page);
 
 	spin_lock_irq(&info->lock);
 	info->alloced++;
diff --git a/mm/swap.c b/mm/swap.c
index f7026f72aca9..6196d792c952 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -424,37 +424,6 @@ void mark_page_accessed(struct page *page)
 }
 EXPORT_SYMBOL(mark_page_accessed);
 
-static void __lru_cache_add(struct page *page)
-{
-	struct pagevec *pvec;
-
-	local_lock(&lru_pvecs.lock);
-	pvec = this_cpu_ptr(&lru_pvecs.lru_add);
-	get_page(page);
-	if (!pagevec_add(pvec, page) || PageCompound(page))
-		__pagevec_lru_add(pvec);
-	local_unlock(&lru_pvecs.lock);
-}
-
-/**
- * lru_cache_add_anon - add a page to the page lists
- * @page: the page to add
- */
-void lru_cache_add_anon(struct page *page)
-{
-	if (PageActive(page))
-		ClearPageActive(page);
-	__lru_cache_add(page);
-}
-
-void lru_cache_add_file(struct page *page)
-{
-	if (PageActive(page))
-		ClearPageActive(page);
-	__lru_cache_add(page);
-}
-EXPORT_SYMBOL(lru_cache_add_file);
-
 /**
  * lru_cache_add - add a page to a page list
  * @page: the page to be added to the LRU.
@@ -466,10 +435,19 @@ EXPORT_SYMBOL(lru_cache_add_file);
  */
 void lru_cache_add(struct page *page)
 {
+	struct pagevec *pvec;
+
 	VM_BUG_ON_PAGE(PageActive(page) && PageUnevictable(page), page);
 	VM_BUG_ON_PAGE(PageLRU(page), page);
-	__lru_cache_add(page);
+
+	get_page(page);
+	local_lock(&lru_pvecs.lock);
+	pvec = this_cpu_ptr(&lru_pvecs.lru_add);
+	if (!pagevec_add(pvec, page) || PageCompound(page))
+		__pagevec_lru_add(pvec);
+	local_unlock(&lru_pvecs.lock);
 }
+EXPORT_SYMBOL(lru_cache_add);
 
 /**
  * lru_cache_add_active_or_unevictable
diff --git a/mm/swap_state.c b/mm/swap_state.c
index ab0462819a5b..fa089002125f 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -442,7 +442,7 @@ struct page *__read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,
 
 	/* Caller will initiate read into locked page */
 	SetPageWorkingset(page);
-	lru_cache_add_anon(page);
+	lru_cache_add(page);
 	*new_page_allocated = true;
 	return page;