[PATCH 02/18] mm: use kunmap_local_dirty in memcpy_to_page
From: Christoph Hellwig <hch@lst.de>
Date: 2021-06-15 13:26:30
Also in:
ceph-devel, dm-devel, linux-block, linux-mips, linuxppc-dev, lkml
Subsystem:
memory management - core, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
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 --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)
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2.30.2