add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/powerpc/kernel/crash_dump.c
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@@ -1,12 +1,10 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Routines for doing kexec-based kdump.
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  *
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  * Copyright (C) 2005, IBM Corp.
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  *
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  * Created by: Michael Ellerman
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- *
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- * This source code is licensed under the GNU General Public License,
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- * Version 2.  See the file COPYING for more details.
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  */
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 #undef DEBUG
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@@ -20,6 +18,7 @@
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 #include <asm/firmware.h>
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 #include <linux/uaccess.h>
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 #include <asm/rtas.h>
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+#include <asm/inst.h>
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 #ifdef DEBUG
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 #include <asm/udbg.h>
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@@ -36,7 +35,7 @@
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 static void __init create_trampoline(unsigned long addr)
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 {
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-	unsigned int *p = (unsigned int *)addr;
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+	struct ppc_inst *p = (struct ppc_inst *)addr;
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 	/* The maximum range of a single instruction branch, is the current
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 	 * instruction's address + (32 MB - 4) bytes. For the trampoline we
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@@ -46,8 +45,8 @@
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 	 * branch to "addr" we jump to ("addr" + 32 MB). Although it requires
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 	 * two instructions it doesn't require any registers.
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 	 */
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-	patch_instruction(p, PPC_INST_NOP);
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-	patch_branch(++p, addr + PHYSICAL_START, 0);
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+	patch_instruction(p, ppc_inst(PPC_INST_NOP));
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+	patch_branch((void *)p + 4, addr + PHYSICAL_START, 0);
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 }
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 void __init setup_kdump_trampoline(void)
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@@ -110,7 +109,7 @@
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 		vaddr = __va(paddr);
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 		csize = copy_oldmem_vaddr(vaddr, buf, csize, offset, userbuf);
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 	} else {
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-		vaddr = __ioremap(paddr, PAGE_SIZE, 0);
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+		vaddr = ioremap_cache(paddr, PAGE_SIZE);
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 		csize = copy_oldmem_vaddr(vaddr, buf, csize, offset, userbuf);
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 		iounmap(vaddr);
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 	}