add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/x86/lib/atomic64_386_32.S
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@@ -1,93 +1,91 @@
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
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 /*
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  * atomic64_t for 386/486
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  *
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  * Copyright © 2010  Luca Barbieri
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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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 #include <linux/linkage.h>
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-#include <asm/alternative-asm.h>
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+#include <asm/alternative.h>
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 /* if you want SMP support, implement these with real spinlocks */
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-.macro LOCK reg
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+.macro IRQ_SAVE reg
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 	pushfl
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 	cli
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 .endm
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-.macro UNLOCK reg
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+.macro IRQ_RESTORE reg
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 	popfl
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 .endm
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-#define BEGIN(op) \
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+#define BEGIN_IRQ_SAVE(op) \
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 .macro endp; \
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-ENDPROC(atomic64_##op##_386); \
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+SYM_FUNC_END(atomic64_##op##_386); \
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 .purgem endp; \
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 .endm; \
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-ENTRY(atomic64_##op##_386); \
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-	LOCK v;
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+SYM_FUNC_START(atomic64_##op##_386); \
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+	IRQ_SAVE v;
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 #define ENDP endp
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-#define RET \
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-	UNLOCK v; \
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-	ret
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-
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-#define RET_ENDP \
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-	RET; \
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-	ENDP
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+#define RET_IRQ_RESTORE \
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+	IRQ_RESTORE v; \
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+	RET
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 #define v %ecx
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-BEGIN(read)
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+BEGIN_IRQ_SAVE(read)
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 	movl  (v), %eax
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 	movl 4(v), %edx
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-RET_ENDP
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+	RET_IRQ_RESTORE
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+ENDP
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 #undef v
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 #define v %esi
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-BEGIN(set)
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+BEGIN_IRQ_SAVE(set)
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 	movl %ebx,  (v)
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 	movl %ecx, 4(v)
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-RET_ENDP
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+	RET_IRQ_RESTORE
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+ENDP
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 #undef v
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 #define v  %esi
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-BEGIN(xchg)
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+BEGIN_IRQ_SAVE(xchg)
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 	movl  (v), %eax
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 	movl 4(v), %edx
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 	movl %ebx,  (v)
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 	movl %ecx, 4(v)
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-RET_ENDP
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+	RET_IRQ_RESTORE
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+ENDP
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 #undef v
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 #define v %ecx
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-BEGIN(add)
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+BEGIN_IRQ_SAVE(add)
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 	addl %eax,  (v)
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 	adcl %edx, 4(v)
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-RET_ENDP
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+	RET_IRQ_RESTORE
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+ENDP
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 #undef v
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 #define v %ecx
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-BEGIN(add_return)
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+BEGIN_IRQ_SAVE(add_return)
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 	addl  (v), %eax
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 	adcl 4(v), %edx
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 	movl %eax,  (v)
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 	movl %edx, 4(v)
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-RET_ENDP
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+	RET_IRQ_RESTORE
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+ENDP
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 #undef v
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 #define v %ecx
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-BEGIN(sub)
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+BEGIN_IRQ_SAVE(sub)
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 	subl %eax,  (v)
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 	sbbl %edx, 4(v)
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-RET_ENDP
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+	RET_IRQ_RESTORE
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+ENDP
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 #undef v
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 #define v %ecx
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-BEGIN(sub_return)
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+BEGIN_IRQ_SAVE(sub_return)
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 	negl %edx
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 	negl %eax
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 	sbbl $0, %edx
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@@ -95,47 +93,52 @@
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 	adcl 4(v), %edx
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 	movl %eax,  (v)
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 	movl %edx, 4(v)
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-RET_ENDP
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+	RET_IRQ_RESTORE
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+ENDP
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 #undef v
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 #define v %esi
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-BEGIN(inc)
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+BEGIN_IRQ_SAVE(inc)
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 	addl $1,  (v)
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 	adcl $0, 4(v)
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-RET_ENDP
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+	RET_IRQ_RESTORE
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+ENDP
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 #undef v
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 #define v %esi
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-BEGIN(inc_return)
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+BEGIN_IRQ_SAVE(inc_return)
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 	movl  (v), %eax
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 	movl 4(v), %edx
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 	addl $1, %eax
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 	adcl $0, %edx
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 	movl %eax,  (v)
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 	movl %edx, 4(v)
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-RET_ENDP
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+	RET_IRQ_RESTORE
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+ENDP
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 #undef v
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 #define v %esi
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-BEGIN(dec)
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+BEGIN_IRQ_SAVE(dec)
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 	subl $1,  (v)
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 	sbbl $0, 4(v)
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-RET_ENDP
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+	RET_IRQ_RESTORE
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+ENDP
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 #undef v
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 #define v %esi
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-BEGIN(dec_return)
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+BEGIN_IRQ_SAVE(dec_return)
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 	movl  (v), %eax
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 	movl 4(v), %edx
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 	subl $1, %eax
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 	sbbl $0, %edx
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 	movl %eax,  (v)
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 	movl %edx, 4(v)
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-RET_ENDP
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+	RET_IRQ_RESTORE
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+ENDP
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 #undef v
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 #define v %esi
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-BEGIN(add_unless)
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+BEGIN_IRQ_SAVE(add_unless)
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 	addl %eax, %ecx
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 	adcl %edx, %edi
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 	addl  (v), %eax
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@@ -147,7 +150,7 @@
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 	movl %edx, 4(v)
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 	movl $1, %eax
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 2:
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-	RET
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+	RET_IRQ_RESTORE
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 3:
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 	cmpl %edx, %edi
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 	jne 1b
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@@ -157,7 +160,7 @@
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 #undef v
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 #define v %esi
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-BEGIN(inc_not_zero)
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+BEGIN_IRQ_SAVE(inc_not_zero)
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 	movl  (v), %eax
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 	movl 4(v), %edx
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 	testl %eax, %eax
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@@ -169,7 +172,7 @@
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 	movl %edx, 4(v)
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 	movl $1, %eax
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 2:
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-	RET
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+	RET_IRQ_RESTORE
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 3:
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 	testl %edx, %edx
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 	jne 1b
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@@ -178,7 +181,7 @@
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 #undef v
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 #define v %esi
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-BEGIN(dec_if_positive)
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+BEGIN_IRQ_SAVE(dec_if_positive)
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 	movl  (v), %eax
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 	movl 4(v), %edx
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 	subl $1, %eax
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@@ -187,5 +190,6 @@
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 	movl %eax,  (v)
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 	movl %edx, 4(v)
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 1:
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-RET_ENDP
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+	RET_IRQ_RESTORE
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+ENDP
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 #undef v