From: Mike Rapoport <[email protected]>
commit a3a8833dffb7e7329c2586b8bfc531adb503f123 upstream.
Commit cb9f753a3731 ("mm: fix races between swapoff and flush dcache")
updated flush_dcache_page implementations on several architectures to
use page_mapping_file() in order to avoid races between page_mapping()
and swapoff().
This update missed arch/nds32 and there is a possibility of a race
there.
Replace page_mapping() with page_mapping_file() in nds32 implementation
of flush_dcache_page().
Link: https://lkml.kernel.org/r/[email protected]
Fixes: cb9f753a3731 ("mm: fix races between swapoff and flush dcache")
Signed-off-by: Mike Rapoport <[email protected]>
Reviewed-by: Matthew Wilcox (Oracle) <[email protected]>
Acked-by: Greentime Hu <[email protected]>
Cc: Huang Ying <[email protected]>
Cc: Nick Hu <[email protected]>
Cc: Vincent Chen <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/nds32/mm/cacheflush.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/nds32/mm/cacheflush.c
+++ b/arch/nds32/mm/cacheflush.c
@@ -239,7 +239,7 @@ void flush_dcache_page(struct page *page
{
struct address_space *mapping;
- mapping = page_mapping(page);
+ mapping = page_mapping_file(page);
if (mapping && !mapping_mapped(mapping))
set_bit(PG_dcache_dirty, &page->flags);
else {
