diff mbox series

[02/18] mm: use kunmap_local_dirty in memcpy_to_page

Message ID 20210615132456.753241-3-hch@lst.de (mailing list archive)
State Not Applicable
Headers show
Series [01/18] mm: add a kunmap_local_dirty helper | expand

Commit Message

Christoph Hellwig June 15, 2021, 1:24 p.m. UTC 
memcpy_to_page can write to potentially mapped page cache pages, so
use kunmap_local_dirty to make sure flush_kernel_dcache_pages is
called.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 include/linux/highmem.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index 65f548db4f2d..d0497c0daf80 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -333,7 +333,7 @@  static inline void memcpy_to_page(struct page *page, size_t offset,
 
 	VM_BUG_ON(offset + len > PAGE_SIZE);
 	memcpy(to + offset, from, len);
-	kunmap_local(to);
+	kunmap_local_dirty(page, to);
 }
 
 static inline void memzero_page(struct page *page, size_t offset, size_t len)