add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/openrisc/mm/ioremap.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * OpenRISC ioremap.c
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  *
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@@ -8,20 +9,15 @@
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  * Modifications for the OpenRISC architecture:
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  * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
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  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
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- *
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- *      This program is free software; you can redistribute it and/or
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- *      modify it under the terms of the GNU General Public License
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- *      as published by the Free Software Foundation; either version
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- *      2 of the License, or (at your option) any later version.
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  */
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 #include <linux/vmalloc.h>
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 #include <linux/io.h>
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+#include <linux/pgtable.h>
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 #include <asm/pgalloc.h>
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 #include <asm/kmap_types.h>
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 #include <asm/fixmap.h>
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 #include <asm/bug.h>
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-#include <asm/pgtable.h>
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 #include <linux/sched.h>
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 #include <asm/tlbflush.h>
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@@ -38,8 +34,7 @@
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  * have to convert them into an offset in a page-aligned mapping, but the
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  * caller shouldn't need to know that small detail.
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  */
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-void __iomem *__ref
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-__ioremap(phys_addr_t addr, unsigned long size, pgprot_t prot)
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+void __iomem *__ref ioremap(phys_addr_t addr, unsigned long size)
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 {
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 	phys_addr_t p;
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 	unsigned long v;
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@@ -70,7 +65,8 @@
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 		fixmaps_used += (size >> PAGE_SHIFT);
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 	}
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-	if (ioremap_page_range(v, v + size, p, prot)) {
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+	if (ioremap_page_range(v, v + size, p,
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+			__pgprot(pgprot_val(PAGE_KERNEL) | _PAGE_CI))) {
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 		if (likely(mem_init_done))
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 			vfree(area->addr);
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 		else
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@@ -80,7 +76,7 @@
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 	return (void __iomem *)(offset + (char *)v);
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 }
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-EXPORT_SYMBOL(__ioremap);
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+EXPORT_SYMBOL(ioremap);
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 void iounmap(void *addr)
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 {
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@@ -118,18 +114,18 @@
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  * the memblock infrastructure.
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  */
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-pte_t __ref *pte_alloc_one_kernel(struct mm_struct *mm,
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-					 unsigned long address)
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+pte_t __ref *pte_alloc_one_kernel(struct mm_struct *mm)
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 {
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 	pte_t *pte;
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 	if (likely(mem_init_done)) {
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-		pte = (pte_t *) __get_free_page(GFP_KERNEL);
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+		pte = (pte_t *)get_zeroed_page(GFP_KERNEL);
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 	} else {
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-		pte = (pte_t *) __va(memblock_alloc(PAGE_SIZE, PAGE_SIZE));
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+		pte = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
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+		if (!pte)
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+			panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
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+			      __func__, PAGE_SIZE, PAGE_SIZE);
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 	}
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-	if (pte)
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-		clear_page(pte);
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 	return pte;
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 }