v4.19.13 snapshot.
diff --git a/arch/nios2/include/asm/irqflags.h b/arch/nios2/include/asm/irqflags.h
new file mode 100644
index 0000000..75ab92e
--- /dev/null
+++ b/arch/nios2/include/asm/irqflags.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#ifndef _ASM_IRQFLAGS_H
+#define _ASM_IRQFLAGS_H
+
+#include <asm/registers.h>
+
+static inline unsigned long arch_local_save_flags(void)
+{
+ return RDCTL(CTL_STATUS);
+}
+
+/*
+ * This will restore ALL status register flags, not only the interrupt
+ * mask flag.
+ */
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+ WRCTL(CTL_STATUS, flags);
+}
+
+static inline void arch_local_irq_disable(void)
+{
+ unsigned long flags;
+
+ flags = arch_local_save_flags();
+ arch_local_irq_restore(flags & ~STATUS_PIE);
+}
+
+static inline void arch_local_irq_enable(void)
+{
+ unsigned long flags;
+
+ flags = arch_local_save_flags();
+ arch_local_irq_restore(flags | STATUS_PIE);
+}
+
+static inline int arch_irqs_disabled_flags(unsigned long flags)
+{
+ return (flags & STATUS_PIE) == 0;
+}
+
+static inline int arch_irqs_disabled(void)
+{
+ return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+static inline unsigned long arch_local_irq_save(void)
+{
+ unsigned long flags;
+
+ flags = arch_local_save_flags();
+ arch_local_irq_restore(flags & ~STATUS_PIE);
+ return flags;
+}
+
+#endif /* _ASM_IRQFLAGS_H */