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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/sh/include/asm/spinlock-llsc.h
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@@ -1,12 +1,9 @@
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-/*
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+/* SPDX-License-Identifier: GPL-2.0
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+ *
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  * include/asm-sh/spinlock-llsc.h
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  *
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  * Copyright (C) 2002, 2003 Paul Mundt
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  * Copyright (C) 2006, 2007 Akio Idehara
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- *
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- * This file is subject to the terms and conditions of the GNU General Public
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- * License.  See the file "COPYING" in the main directory of this archive
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- * for more details.
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  */
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 #ifndef __ASM_SH_SPINLOCK_LLSC_H
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 #define __ASM_SH_SPINLOCK_LLSC_H
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@@ -50,6 +47,8 @@
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 {
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 	unsigned long tmp;
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+	/* This could be optimised with ARCH_HAS_MMIOWB */
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+	mmiowb();
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 	__asm__ __volatile__ (
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 		"mov		#1, %0 ! arch_spin_unlock	\n\t"
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 		"mov.l		%0, @%1				\n\t"