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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/powerpc/include/asm/io-workarounds.h
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@@ -1,26 +1,14 @@
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
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 /*
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  * Support PCI IO workaround
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  *
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  * (C) Copyright 2007-2008 TOSHIBA CORPORATION
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License along
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- * with this program; if not, write to the Free Software Foundation, Inc.,
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- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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  */
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 #ifndef _IO_WORKAROUNDS_H
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 #define _IO_WORKAROUNDS_H
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+#ifdef CONFIG_PPC_IO_WORKAROUNDS
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 #include <linux/io.h>
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 #include <asm/pci-bridge.h>
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@@ -45,4 +33,23 @@
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 #define SPIDER_PCI_DUMMY_READ		0x0810
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 #define SPIDER_PCI_DUMMY_READ_BASE	0x0814
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+#endif
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+
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+#if defined(CONFIG_PPC_IO_WORKAROUNDS) && defined(CONFIG_PPC_INDIRECT_MMIO)
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+extern bool io_workaround_inited;
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+
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+static inline bool iowa_is_active(void)
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+{
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+	return unlikely(io_workaround_inited);
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+}
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+#else
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+static inline bool iowa_is_active(void)
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+{
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+	return false;
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+}
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+#endif
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+
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+void __iomem *iowa_ioremap(phys_addr_t addr, unsigned long size,
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+			   pgprot_t prot, void *caller);
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+
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 #endif /* _IO_WORKAROUNDS_H */