linux-kernel - [PATCH v2 3/8] mm/hugetlb: convert putback_active

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Date:   Wed, 25 Jan 2023 09:05:32 -0800
From:   Sidhartha Kumar <sidhartha.kumar@...cle.com>
To:     linux-kernel@...r.kernel.org, linux-mm@...ck.org
Cc:     akpm@...ux-foundation.org, songmuchun@...edance.com,
        mike.kravetz@...cle.com, willy@...radead.org, jhubbard@...dia.com,
        gerald.schaefer@...ux.ibm.com,
        Sidhartha Kumar <sidhartha.kumar@...cle.com>
Subject: [PATCH v2 3/8] mm/hugetlb: convert putback_active_hugepage to take in a folio

Convert putback_active_hugepage() to folio_putback_active_hugetlb(), this
removes one user of the Huge Page macros which take in a page. The callers
in migrate.c are also cleaned up by being able to directly use the src and
dst folio variables.

Signed-off-by: Sidhartha Kumar <sidhartha.kumar@...cle.com>
Reviewed-by: Mike Kravetz <mike.kravetz@...cle.com>
---
The call to folio_putback_active_hugetlb(page_folio(page)); in
putback_movable_pages() is being converted so that a folio can be
passed directly. This patch has been sent by Vishal Moola and is
currently under review.

 include/linux/hugetlb.h | 4 ++--
 mm/hugetlb.c            | 8 ++++----
 mm/migrate.c            | 8 ++++----
 3 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 06eb59711e4a..1170db8e7831 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -174,7 +174,7 @@ int isolate_hugetlb(struct folio *folio, struct list_head *list);
 int get_hwpoison_hugetlb_folio(struct folio *folio, bool *hugetlb, bool unpoison);
 int get_huge_page_for_hwpoison(unsigned long pfn, int flags,
 				bool *migratable_cleared);
-void putback_active_hugepage(struct page *page);
+void folio_putback_active_hugetlb(struct folio *folio);
 void move_hugetlb_state(struct folio *old_folio, struct folio *new_folio, int reason);
 void free_huge_page(struct page *page);
 void hugetlb_fix_reserve_counts(struct inode *inode);
@@ -428,7 +428,7 @@ static inline int get_huge_page_for_hwpoison(unsigned long pfn, int flags,
 	return 0;
 }
 
-static inline void putback_active_hugepage(struct page *page)
+static inline void folio_putback_active_hugetlb(struct folio *folio)
 {
 }
 
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index e506a46b7871..ded5fe790c79 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -7300,13 +7300,13 @@ int get_huge_page_for_hwpoison(unsigned long pfn, int flags,
 	return ret;
 }
 
-void putback_active_hugepage(struct page *page)
+void folio_putback_active_hugetlb(struct folio *folio)
 {
 	spin_lock_irq(&hugetlb_lock);
-	SetHPageMigratable(page);
-	list_move_tail(&page->lru, &(page_hstate(page))->hugepage_activelist);
+	folio_set_hugetlb_migratable(folio);
+	list_move_tail(&folio->lru, &(folio_hstate(folio))->hugepage_activelist);
 	spin_unlock_irq(&hugetlb_lock);
-	put_page(page);
+	folio_put(folio);
 }
 
 void move_hugetlb_state(struct folio *old_folio, struct folio *new_folio, int reason)
diff --git a/mm/migrate.c b/mm/migrate.c
index 92d53e0b609a..b971edbf32fc 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -151,7 +151,7 @@ void putback_movable_pages(struct list_head *l)
 
 	list_for_each_entry_safe(page, page2, l, lru) {
 		if (unlikely(PageHuge(page))) {
-			putback_active_hugepage(page);
+			folio_putback_active_hugetlb(page_folio(page));
 			continue;
 		}
 		list_del(&page->lru);
@@ -1374,7 +1374,7 @@ static int unmap_and_move_huge_page(new_page_t get_new_page,
 
 	if (folio_ref_count(src) == 1) {
 		/* page was freed from under us. So we are done. */
-		putback_active_hugepage(hpage);
+		folio_putback_active_hugetlb(src);
 		return MIGRATEPAGE_SUCCESS;
 	}
 
@@ -1459,7 +1459,7 @@ static int unmap_and_move_huge_page(new_page_t get_new_page,
 	folio_unlock(src);
 out:
 	if (rc == MIGRATEPAGE_SUCCESS)
-		putback_active_hugepage(hpage);
+		folio_putback_active_hugetlb(src);
 	else if (rc != -EAGAIN)
 		list_move_tail(&src->lru, ret);
 
@@ -1471,7 +1471,7 @@ static int unmap_and_move_huge_page(new_page_t get_new_page,
 	if (put_new_page)
 		put_new_page(new_hpage, private);
 	else
-		putback_active_hugepage(new_hpage);
+		folio_putback_active_hugetlb(dst);
 
 	return rc;
 }
-- 
2.39.1