mm-change-to-return-bool-for-isolate_lru_page.patch removed from -mm tree

@@ -113,17 +113,11 @@ struct page *grab_cache_page_write_begin
 }
 EXPORT_SYMBOL(grab_cache_page_write_begin);
 
-int isolate_lru_page(struct page *page)
+bool isolate_lru_page(struct page *page)
 {
-	bool ret;
-
 	if (WARN_RATELIMIT(PageTail(page), "trying to isolate tail page"))
-		return -EBUSY;
-	ret = folio_isolate_lru((struct folio *)page);
-	if (ret)
-		return 0;
-
-	return -EBUSY;
+		return false;
+	return folio_isolate_lru((struct folio *)page);
 }
 
 void putback_lru_page(struct page *page)

@@ -187,7 +187,7 @@ pgprot_t __init early_memremap_pgprot_ad
 /*
  * in mm/vmscan.c:
  */
-int isolate_lru_page(struct page *page);
+bool isolate_lru_page(struct page *page);
 bool folio_isolate_lru(struct folio *folio);
 void putback_lru_page(struct page *page);
 void folio_putback_lru(struct folio *folio);

@@ -636,7 +636,7 @@ static int __collapse_huge_page_isolate(
 		 * Isolate the page to avoid collapsing an hugepage
 		 * currently in use by the VM.
 		 */
-		if (isolate_lru_page(page)) {
+		if (!isolate_lru_page(page)) {
 			unlock_page(page);
 			result = SCAN_DEL_PAGE_LRU;
 			goto out;

@@ -6176,7 +6176,7 @@ static int mem_cgroup_move_charge_pte_ra
 		target_type = get_mctgt_type_thp(vma, addr, *pmd, &target);
 		if (target_type == MC_TARGET_PAGE) {
 			page = target.page;
-			if (!isolate_lru_page(page)) {
+			if (isolate_lru_page(page)) {
 				if (!mem_cgroup_move_account(page, true,
 							     mc.from, mc.to)) {
 					mc.precharge -= HPAGE_PMD_NR;

@@ -6226,7 +6226,7 @@ retry:
 			 */
 			if (PageTransCompound(page))
 				goto put;
-			if (!device && isolate_lru_page(page))
+			if (!device && !isolate_lru_page(page))
 				goto put;
 			if (!mem_cgroup_move_account(page, false,
 						mc.from, mc.to)) {

@@ -846,7 +846,7 @@ static const char * const action_page_ty
  */
 static int delete_from_lru_cache(struct page *p)
 {
-	if (!isolate_lru_page(p)) {
+	if (isolate_lru_page(p)) {
 		/*
 		 * Clear sensible page flags, so that the buddy system won't
 		 * complain when the page is unpoison-and-freed.

@@ -2513,7 +2513,7 @@ static bool isolate_page(struct page *pa
 		bool lru = !__PageMovable(page);
 
 		if (lru)
-			isolated = !isolate_lru_page(page);
+			isolated = isolate_lru_page(page);
 		else
 			isolated = !isolate_movable_page(page,
 							 ISOLATE_UNEVICTABLE);

@@ -1632,6 +1632,7 @@ do_migrate_range(unsigned long start_pfn
 
 	for (pfn = start_pfn; pfn < end_pfn; pfn++) {
 		struct folio *folio;
+		bool isolated;
 
 		if (!pfn_valid(pfn))
 			continue;

@@ -1667,9 +1668,10 @@ do_migrate_range(unsigned long start_pfn
 		 * We can skip free pages. And we can deal with pages on
 		 * LRU and non-lru movable pages.
 		 */
-		if (PageLRU(page))
-			ret = isolate_lru_page(page);
-		else
+		if (PageLRU(page)) {
+			isolated = isolate_lru_page(page);
+			ret = isolated ? 0 : -EBUSY;
+		} else
 			ret = isolate_movable_page(page, ISOLATE_UNEVICTABLE);
 		if (!ret) { /* Success */
 			list_add_tail(&page->lru, &source);

@@ -2132,11 +2132,14 @@ static int add_page_for_migration(struct
 		}
 	} else {
 		struct page *head;
+		bool isolated;
 
 		head = compound_head(page);
-		err = isolate_lru_page(head);
-		if (err)
+		isolated = isolate_lru_page(head);
+		if (!isolated) {
+			err = -EBUSY;
 			goto out_putpage;
+		}
 
 		err = 1;
 		list_add_tail(&head->lru, pagelist);

@@ -2541,7 +2544,7 @@ static int numamigrate_isolate_page(pg_d
 		return 0;
 	}
 
-	if (isolate_lru_page(page))
+	if (!isolate_lru_page(page))
 		return 0;
 
 	mod_node_page_state(page_pgdat(page), NR_ISOLATED_ANON + page_is_file_lru(page),

@@ -388,7 +388,7 @@ static unsigned long migrate_device_unma
 				allow_drain = false;
 			}
 
-			if (isolate_lru_page(page)) {
+			if (!isolate_lru_page(page)) {
 				src_pfns[i] &= ~MIGRATE_PFN_MIGRATE;
 				restore++;
 				continue;