修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

 kernel/arch/x86/include/asm/smap.h
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@@ -1,37 +1,31 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * Supervisor Mode Access Prevention support
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  *
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  * Copyright (C) 2012 Intel Corporation
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  * Author: H. Peter Anvin <hpa@linux.intel.com>
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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; version 2
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- * of the License.
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  */
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 #ifndef _ASM_X86_SMAP_H
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 #define _ASM_X86_SMAP_H
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-#include <linux/stringify.h>
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 #include <asm/nops.h>
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 #include <asm/cpufeatures.h>
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+#include <asm/alternative.h>
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 /* "Raw" instruction opcodes */
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-#define __ASM_CLAC	.byte 0x0f,0x01,0xca
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-#define __ASM_STAC	.byte 0x0f,0x01,0xcb
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+#define __ASM_CLAC	".byte 0x0f,0x01,0xca"
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+#define __ASM_STAC	".byte 0x0f,0x01,0xcb"
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 #ifdef __ASSEMBLY__
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-
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-#include <asm/alternative-asm.h>
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 #ifdef CONFIG_X86_SMAP
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 #define ASM_CLAC \
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-	ALTERNATIVE "", __stringify(__ASM_CLAC), X86_FEATURE_SMAP
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+	ALTERNATIVE "", __ASM_CLAC, X86_FEATURE_SMAP
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 #define ASM_STAC \
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-	ALTERNATIVE "", __stringify(__ASM_STAC), X86_FEATURE_SMAP
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+	ALTERNATIVE "", __ASM_STAC, X86_FEATURE_SMAP
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 #else /* CONFIG_X86_SMAP */
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@@ -42,28 +36,28 @@
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 #else /* __ASSEMBLY__ */
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-#include <asm/alternative.h>
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-
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 #ifdef CONFIG_X86_SMAP
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 static __always_inline void clac(void)
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 {
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 	/* Note: a barrier is implicit in alternative() */
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-	alternative("", __stringify(__ASM_CLAC), X86_FEATURE_SMAP);
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+	alternative("", __ASM_CLAC, X86_FEATURE_SMAP);
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 }
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 static __always_inline void stac(void)
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 {
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 	/* Note: a barrier is implicit in alternative() */
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-	alternative("", __stringify(__ASM_STAC), X86_FEATURE_SMAP);
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+	alternative("", __ASM_STAC, X86_FEATURE_SMAP);
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 }
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 static __always_inline unsigned long smap_save(void)
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 {
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 	unsigned long flags;
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-	asm volatile (ALTERNATIVE("", "pushf; pop %0; " __stringify(__ASM_CLAC),
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-				  X86_FEATURE_SMAP)
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+	asm volatile ("# smap_save\n\t"
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+		      ALTERNATIVE("jmp 1f", "", X86_FEATURE_SMAP)
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+		      "pushf; pop %0; " __ASM_CLAC "\n\t"
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+		      "1:"
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 		      : "=rm" (flags) : : "memory", "cc");
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 	return flags;
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@@ -71,15 +65,18 @@
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 static __always_inline void smap_restore(unsigned long flags)
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 {
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-	asm volatile (ALTERNATIVE("", "push %0; popf", X86_FEATURE_SMAP)
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+	asm volatile ("# smap_restore\n\t"
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+		      ALTERNATIVE("jmp 1f", "", X86_FEATURE_SMAP)
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+		      "push %0; popf\n\t"
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+		      "1:"
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 		      : : "g" (flags) : "memory", "cc");
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 }
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 /* These macros can be used in asm() statements */
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 #define ASM_CLAC \
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-	ALTERNATIVE("", __stringify(__ASM_CLAC), X86_FEATURE_SMAP)
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+	ALTERNATIVE("", __ASM_CLAC, X86_FEATURE_SMAP)
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 #define ASM_STAC \
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-	ALTERNATIVE("", __stringify(__ASM_STAC), X86_FEATURE_SMAP)
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+	ALTERNATIVE("", __ASM_STAC, X86_FEATURE_SMAP)
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 #else /* CONFIG_X86_SMAP */
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