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0330581ab3
In SMP mode, the kernel would produce call trace when resumed from hibernation. The reason is when the function destroy_context is called to drop the resuming mm context, the mm->context.active is 1 which is wrong and should be zero. We pass the current->active_mm as previous mm context to function switch_mmu_context to decrease the context.active by 1. In UP mode, there is no effect. Signed-off-by: Tang Yuantian <b29983@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
38 lines
889 B
C
38 lines
889 B
C
/*
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* Common powerpc suspend code for 32 and 64 bits
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*
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* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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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; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/sched.h>
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#include <asm/system.h>
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#include <asm/current.h>
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#include <asm/mmu_context.h>
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void save_processor_state(void)
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{
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/*
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* flush out all the special registers so we don't need
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* to save them in the snapshot
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*/
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flush_fp_to_thread(current);
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flush_altivec_to_thread(current);
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flush_spe_to_thread(current);
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#ifdef CONFIG_PPC64
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hard_irq_disable();
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#endif
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}
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void restore_processor_state(void)
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{
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#ifdef CONFIG_PPC32
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switch_mmu_context(current->active_mm, current->active_mm);
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#endif
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}
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