v4.19.13 snapshot.
diff --git a/arch/arm/kernel/isa.c b/arch/arm/kernel/isa.c
new file mode 100644
index 0000000..9d1cf71
--- /dev/null
+++ b/arch/arm/kernel/isa.c
@@ -0,0 +1,70 @@
+/*
+ * linux/arch/arm/kernel/isa.c
+ *
+ * Copyright (C) 1999 Phil Blundell
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * ISA shared memory and I/O port support, and is required to support
+ * iopl, inb, outb and friends in userspace via glibc emulation.
+ */
+#include <linux/stddef.h>
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/sysctl.h>
+#include <linux/init.h>
+#include <linux/io.h>
+
+static unsigned int isa_membase, isa_portbase, isa_portshift;
+
+static struct ctl_table ctl_isa_vars[4] = {
+ {
+ .procname = "membase",
+ .data = &isa_membase,
+ .maxlen = sizeof(isa_membase),
+ .mode = 0444,
+ .proc_handler = proc_dointvec,
+ }, {
+ .procname = "portbase",
+ .data = &isa_portbase,
+ .maxlen = sizeof(isa_portbase),
+ .mode = 0444,
+ .proc_handler = proc_dointvec,
+ }, {
+ .procname = "portshift",
+ .data = &isa_portshift,
+ .maxlen = sizeof(isa_portshift),
+ .mode = 0444,
+ .proc_handler = proc_dointvec,
+ }, {}
+};
+
+static struct ctl_table_header *isa_sysctl_header;
+
+static struct ctl_table ctl_isa[2] = {
+ {
+ .procname = "isa",
+ .mode = 0555,
+ .child = ctl_isa_vars,
+ }, {}
+};
+
+static struct ctl_table ctl_bus[2] = {
+ {
+ .procname = "bus",
+ .mode = 0555,
+ .child = ctl_isa,
+ }, {}
+};
+
+void __init
+register_isa_ports(unsigned int membase, unsigned int portbase, unsigned int portshift)
+{
+ isa_membase = membase;
+ isa_portbase = portbase;
+ isa_portshift = portshift;
+ isa_sysctl_header = register_sysctl_table(ctl_bus);
+}