enable docker ppp

hc

2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87

 kernel/arch/arc/include/asm/mmu_context.h
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@@ -1,9 +1,6 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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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 version 2 as
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- * published by the Free Software Foundation.
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  *
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  * vineetg: May 2011
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  *  -Refactored get_new_mmu_context( ) to only handle live-mm.
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@@ -147,7 +144,7 @@
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 	 */
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 	cpumask_set_cpu(cpu, mm_cpumask(next));
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-#ifndef CONFIG_SMP
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+#ifdef ARC_USE_SCRATCH_REG
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 	/* PGD cached in MMU reg to avoid 3 mem lookups: task->mm->pgd */
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 	write_aux_reg(ARC_REG_SCRATCH_DATA0, next->pgd);
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 #endif