D56438.diff
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	Index: sys/compat/linuxkpi/common/include/linux/highmem.h
	===================================================================
	--- sys/compat/linuxkpi/common/include/linux/highmem.h
	+++ sys/compat/linuxkpi/common/include/linux/highmem.h
	@@ -99,6 +99,20 @@
	return (kmap(page));
	}

	+static inline void *
	+kmap_local_folio(struct folio *folio, size_t offset)
	+{
	+ struct page *page;
	+ vm_offset_t *vaddr;
	+
	+ page = &folio->page;
	+ vaddr = kmap_local_page(page);
	+
	+ vaddr += offset;
	+
	+ return (vaddr);
	+}
	+
	static inline void *
	kmap_local_page_prot(struct page *page, pgprot_t prot)
	{
	@@ -168,4 +182,13 @@
	kunmap_local(to);
	}

	+static inline void
	+memcpy_to_folio(struct folio folio, size_t offset, const char from, size_t len)
	+{
	+ struct page *page;
	+
	+ page = &folio->page;
	+ memcpy_to_page(page, offset, from, len);
	+}
	+
	#endif /* _LINUXKPI_LINUX_HIGHMEM_H_ */
	Index: sys/compat/linuxkpi/common/include/linux/mm.h
	===================================================================
	--- sys/compat/linuxkpi/common/include/linux/mm.h
	+++ sys/compat/linuxkpi/common/include/linux/mm.h
	@@ -264,6 +264,7 @@
	}

	#define offset_in_page(off) ((unsigned long)(off) & (PAGE_SIZE - 1))
	+#define offset_in_folio(folio, p) ((unsigned long)(p) & (folio_size(folio) - 1))

	static inline void
	set_page_dirty(struct page *page)