[PATCH 2/2] mm: use kmap_local_page in memzero_page

From: Christoph Hellwig
Date: Tue Jul 13 2021 - 01:53:13 EST


The commit message introducing the global memzero_page explicitly
mentions switching to kmap_local_page in the commit log but doesn't
actually do that.

Fixes: 28961998f858 ("iov_iter: lift memzero_page() to highmem.h")
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx>
---
include/linux/highmem.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index 8e7e50a53a12..d9a606a9fc64 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -324,10 +324,10 @@ static inline void memcpy_to_page(struct page *page, size_t offset,

static inline void memzero_page(struct page *page, size_t offset, size_t len)
{
- char *addr = kmap_atomic(page);
+ char *addr = kmap_local_page(page);
memset(addr + offset, 0, len);
flush_dcache_page(page);
- kunmap_atomic(addr);
+ kunmap_local(addr);
}

#endif /* _LINUX_HIGHMEM_H */
--
2.30.2