From 128d1f8241d62ab014eef6dd4ef9bb977dbeadb2 Mon Sep 17 00:00:00 2001
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Date: Wed, 9 Feb 2022 20:21:32 +0000
Subject: fs: Add invalidate_folio() aops method

This is used in preference to invalidatepage, if defined.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Tested-by: Mike Marshall <hubcap@omnibond.com> # orangefs
Tested-by: David Howells <dhowells@redhat.com> # afs
---
 mm/truncate.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'mm/truncate.c')

diff --git a/mm/truncate.c b/mm/truncate.c
index aa0ed373789d..b9ad298e6ce7 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -154,9 +154,15 @@ static int invalidate_exceptional_entry2(struct address_space *mapping,
  */
 void folio_invalidate(struct folio *folio, size_t offset, size_t length)
 {
+	const struct address_space_operations *aops = folio->mapping->a_ops;
 	void (*invalidatepage)(struct page *, unsigned int, unsigned int);
 
-	invalidatepage = folio->mapping->a_ops->invalidatepage;
+	if (aops->invalidate_folio) {
+		aops->invalidate_folio(folio, offset, length);
+		return;
+	}
+
+	invalidatepage = aops->invalidatepage;
 #ifdef CONFIG_BLOCK
 	if (!invalidatepage)
 		invalidatepage = block_invalidatepage;
-- 
cgit