D20789.diff
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	Index: head/sys/compat/linuxkpi/common/include/linux/io.h
	===================================================================
	--- head/sys/compat/linuxkpi/common/include/linux/io.h
	+++ head/sys/compat/linuxkpi/common/include/linux/io.h
	@@ -396,16 +396,25 @@
	#define _ioremap_attr(...) NULL
	#endif

	+#ifdef VM_MEMATTR_DEVICE
	#define ioremap_nocache(addr, size) \
	+ _ioremap_attr((addr), (size), VM_MEMATTR_DEVICE)
	+#define ioremap_wt(addr, size) \
	+ _ioremap_attr((addr), (size), VM_MEMATTR_DEVICE)
	+#define ioremap(addr, size) \
	+ _ioremap_attr((addr), (size), VM_MEMATTR_DEVICE)
	+#else
	+#define ioremap_nocache(addr, size) \
	_ioremap_attr((addr), (size), VM_MEMATTR_UNCACHEABLE)
	-#define ioremap_wc(addr, size) \
	- _ioremap_attr((addr), (size), VM_MEMATTR_WRITE_COMBINING)
	-#define ioremap_wb(addr, size) \
	- _ioremap_attr((addr), (size), VM_MEMATTR_WRITE_BACK)
	#define ioremap_wt(addr, size) \
	_ioremap_attr((addr), (size), VM_MEMATTR_WRITE_THROUGH)
	#define ioremap(addr, size) \
	_ioremap_attr((addr), (size), VM_MEMATTR_UNCACHEABLE)
	+#endif
	+#define ioremap_wc(addr, size) \
	+ _ioremap_attr((addr), (size), VM_MEMATTR_WRITE_COMBINING)
	+#define ioremap_wb(addr, size) \
	+ _ioremap_attr((addr), (size), VM_MEMATTR_WRITE_BACK)
	void iounmap(void *addr);

	#define memset_io(a, b, c) memset((a), (b), (c))