From d1d8a3b4d06d8c9188f2b9b89ef053db0bf899de Mon Sep 17 00:00:00 2001
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Date: Fri, 24 Dec 2021 13:26:22 -0500
Subject: mm: Turn isolate_lru_page() into folio_isolate_lru()

Add isolate_lru_page() as a wrapper around isolate_lru_folio().
TestClearPageLRU() would have always failed on a tail page, so
returning -EBUSY is the same behaviour.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
---
 mm/folio-compat.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'mm/folio-compat.c')

diff --git a/mm/folio-compat.c b/mm/folio-compat.c
index 749555a232a8..a4a7725f4486 100644
--- a/mm/folio-compat.c
+++ b/mm/folio-compat.c
@@ -7,6 +7,7 @@
 #include <linux/migrate.h>
 #include <linux/pagemap.h>
 #include <linux/swap.h>
+#include "internal.h"
 
 struct address_space *page_mapping(struct page *page)
 {
@@ -151,3 +152,10 @@ int try_to_release_page(struct page *page, gfp_t gfp)
 	return filemap_release_folio(page_folio(page), gfp);
 }
 EXPORT_SYMBOL(try_to_release_page);
+
+int isolate_lru_page(struct page *page)
+{
+	if (WARN_RATELIMIT(PageTail(page), "trying to isolate tail page"))
+		return -EBUSY;
+	return folio_isolate_lru((struct folio *)page);
+}
-- 
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