[PATCH v1] Add struct folio to cacheflush.h

[Michael Cheng]

Declare struct folio. This will help resolve warnings on s390 and h8300
platforms.

Suggested-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Michael Cheng <michael.cheng@xxxxxxxxx>
---
 include/linux/cacheflush.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/cacheflush.h b/include/linux/cacheflush.h
index fef8b607f97e..ea32982d6c23 100644
--- a/include/linux/cacheflush.h
+++ b/include/linux/cacheflush.h
@@ -4,6 +4,8 @@
 
 #include <asm/cacheflush.h>
 
+struct folio *folio;
+
 #if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
 #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_FOLIO
 void flush_dcache_folio(struct folio *folio);
-- 
2.25.1