https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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- v2.6.20-rc3
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Tip revision: 3bf8ba38f38d3647368e4edcf7d019f9f8d9184a authored by Linus Torvalds on 24 December 2006, 04:00:32 UTC
Linux 2.6.20-rc2
Linux 2.6.20-rc2
Tip revision: 3bf8ba3
context.c
/*
* linux/arch/arm/mm/context.c
*
* Copyright (C) 2002-2003 Deep Blue Solutions Ltd, all rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <asm/mmu_context.h>
#include <asm/tlbflush.h>
unsigned int cpu_last_asid = { 1 << ASID_BITS };
/*
* We fork()ed a process, and we need a new context for the child
* to run in. We reserve version 0 for initial tasks so we will
* always allocate an ASID.
*/
void __init_new_context(struct task_struct *tsk, struct mm_struct *mm)
{
mm->context.id = 0;
}
void __new_context(struct mm_struct *mm)
{
unsigned int asid;
asid = ++cpu_last_asid;
if (asid == 0)
asid = cpu_last_asid = 1 << ASID_BITS;
/*
* If we've used up all our ASIDs, we need
* to start a new version and flush the TLB.
*/
if ((asid & ~ASID_MASK) == 0)
flush_tlb_all();
mm->context.id = asid;
}