From ece1ed7bfa1208b527b3dc90bb45c55e0d139a88 Mon Sep 17 00:00:00 2001
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Date: Fri, 4 Feb 2022 10:27:40 -0500
Subject: mm/gup: Add try_get_folio() and try_grab_folio()

Convert try_get_compound_head() into try_get_folio() and convert
try_grab_compound_head() into try_grab_folio().  Add a temporary
try_grab_compound_head() wrapper around try_grab_folio() to let us
convert callers individually.

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/internal.h | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'mm/internal.h')

diff --git a/mm/internal.h b/mm/internal.h
index 3756dd5d2c92..98b97cb5a97b 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -737,4 +737,9 @@ int numa_migrate_prep(struct page *page, struct vm_area_struct *vma,
 
 void free_zone_device_page(struct page *page);
 
+/*
+ * mm/gup.c
+ */
+struct folio *try_grab_folio(struct page *page, int refs, unsigned int flags);
+
 #endif	/* __MM_INTERNAL_H */
-- 
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