From 67cc189db497feb752abe29b22d017b5e91af8bf Mon Sep 17 00:00:00 2001
From: Vladimir Kondratyev <wulf@FreeBSD.org>
Date: Sun, 24 Dec 2023 11:19:59 +0300
Subject: [PATCH] LinuxKPI: Add IOMEM_ERR_PTR() to linux/io.h

The function creates an error pointer.

Sponsored by:	Serenity Cyber Security, LLC
Reviewed by:	manu, bz
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D42805

(cherry picked from commit af787b8e8b803dbb2c6bd06629974ba39bd0fb70)
---
 sys/compat/linuxkpi/common/include/linux/io.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/io.h b/sys/compat/linuxkpi/common/include/linux/io.h
index b0a4109f3af..d70cda77400 100644
--- a/sys/compat/linuxkpi/common/include/linux/io.h
+++ b/sys/compat/linuxkpi/common/include/linux/io.h
@@ -35,6 +35,7 @@
 #include <machine/vm.h>
 
 #include <linux/compiler.h>
+#include <linux/err.h>
 #include <linux/types.h>
 #if !defined(__arm__)
 #include <asm/set_memory.h>
@@ -528,6 +529,8 @@ memunmap(void *addr)
 	iounmap(addr);
 }
 
+#define	IOMEM_ERR_PTR(err)	(void __iomem *)ERR_PTR(err)
+
 #define	__MTRR_ID_BASE	1
 int lkpi_arch_phys_wc_add(unsigned long, unsigned long);
 void lkpi_arch_phys_wc_del(int);