disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/include/linux/io-mapping.h
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@@ -1,18 +1,6 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * Copyright © 2008 Keith Packard <keithp@keithp.com>
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- *
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- * This file is free software; you can redistribute it and/or modify
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- * it under the terms of version 2 of the GNU General Public License
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- * as published by the Free Software Foundation.
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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
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- * along with this program; if not, write to the Free Software Foundation,
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- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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  */
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 #ifndef _LINUX_IO_MAPPING_H
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 #include <linux/slab.h>
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 #include <linux/bug.h>
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 #include <linux/io.h>
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+#include <linux/pgtable.h>
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 #include <asm/page.h>
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 /*
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  * The io_mapping mechanism provides an abstraction for mapping
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  * individual pages from an io device to the CPU in an efficient fashion.
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  *
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- * See Documentation/io-mapping.txt
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+ * See Documentation/driver-api/io-mapping.rst
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  */
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 struct io_mapping {
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@@ -40,6 +29,7 @@
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 #ifdef CONFIG_HAVE_ATOMIC_IOMAP
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+#include <linux/pfn.h>
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 #include <asm/iomap.h>
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 /*
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  * For small address space machines, mapping large objects
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@@ -76,12 +66,10 @@
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 			 unsigned long offset)
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 {
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 	resource_size_t phys_addr;
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-	unsigned long pfn;
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 	BUG_ON(offset >= mapping->size);
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 	phys_addr = mapping->base + offset;
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-	pfn = (unsigned long) (phys_addr >> PAGE_SHIFT);
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-	return iomap_atomic_prot_pfn(pfn, mapping->prot);
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+	return iomap_atomic_prot_pfn(PHYS_PFN(phys_addr), mapping->prot);
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 }
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 static inline void
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@@ -112,7 +100,6 @@
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 #else
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 #include <linux/uaccess.h>
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-#include <asm/pgtable.h>
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 /* Create the io_mapping object*/
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 static inline struct io_mapping *