The patch titled
Subject: mm: use kmap_local_page in memzero_page
has been added to the -mm tree. Its filename is
mm-use-kmap_local_page-in-memzero_page.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-use-kmap_local_page-in-memzero_page.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-use-kmap_local_page-in-memzero_page.patch
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------------------------------------------------------
From: Christoph Hellwig <hch@xxxxxx>
Subject: mm: use kmap_local_page in memzero_page
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.
Link: https://lkml.kernel.org/r/20210713055231.137602-3-hch@xxxxxx
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>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/highmem.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/include/linux/highmem.h~mm-use-kmap_local_page-in-memzero_page
+++ a/include/linux/highmem.h
@@ -324,10 +324,10 @@ static inline void memcpy_to_page(struct
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 */
_
Patches currently in -mm which might be from hch@xxxxxx are
mm-fix-the-try_to_unmap-prototype-for-config_mmu.patch
mm-call-flush_dcache_page-in-memcpy_to_page-and-memzero_page.patch
mm-use-kmap_local_page-in-memzero_page.patch
