D49384.id153603.diff
No OneTemporary
Actions

Size

1 KB

Referenced Files

None

Subscribers

None

D49384.id153603.diff
View Options

	diff --git a/sys/compat/linuxkpi/common/include/linux/highmem.h b/sys/compat/linuxkpi/common/include/linux/highmem.h
	--- a/sys/compat/linuxkpi/common/include/linux/highmem.h
	+++ b/sys/compat/linuxkpi/common/include/linux/highmem.h
	@@ -139,4 +139,34 @@
	kunmap_atomic(addr);
	}

	+static inline void
	+memcpy_from_page(char to, struct page page, size_t offset, size_t len)
	+{
	+ char *from;
	+
	+ KASSERT(offset + len <= PAGE_SIZE,
	+ ("%s: memcpy from page %p to address %p: "
	+ "offset+len (%zu+%zu) would go beyond page end",
	+ __func__, page, to, offset, len));
	+
	+ from = kmap_local_page(page);
	+ memcpy(to, from + offset, len);
	+ kunmap_local(from);
	+}
	+
	+static inline void
	+memcpy_to_page(struct page page, size_t offset, const char from, size_t len)
	+{
	+ char *to;
	+
	+ KASSERT(offset + len <= PAGE_SIZE,
	+ ("%s: memcpy from address %p to page %p: "
	+ "offset+len (%zu+%zu) would go beyond page end",
	+ __func__, from, page, offset, len));
	+
	+ to = kmap_local_page(page);
	+ memcpy(to + offset, from, len);
	+ kunmap_local(to);
	+}
	+
	#endif /* _LINUXKPI_LINUX_HIGHMEM_H_ */