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6aa802ce6a
The next stage after removing code which depends on CONFIG_MODE_TT is removing the CHOOSE_MODE abstraction, which provided both compile-time and run-time branching to either tt-mode or skas-mode code. This patch removes choose-mode.h and all inclusions of it, and replaces all CHOOSE_MODE invocations with the skas branch. This leaves a number of trivial functions which will be dealt with in a later patch. There are some changes in the uaccess and tls support which go somewhat beyond this and eliminate some of the now-redundant functions. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/*
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* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#ifndef __UM_MMU_CONTEXT_H
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#define __UM_MMU_CONTEXT_H
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#include <asm-generic/mm_hooks.h>
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#include "linux/sched.h"
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#include "um_mmu.h"
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#define get_mmu_context(task) do ; while(0)
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#define activate_context(tsk) do ; while(0)
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#define deactivate_mm(tsk,mm) do { } while (0)
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extern void force_flush_all(void);
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static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
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{
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/*
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* This is called by fs/exec.c and fs/aio.c. In the first case, for an
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* exec, we don't need to do anything as we're called from userspace
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* and thus going to use a new host PID. In the second, we're called
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* from a kernel thread, and thus need to go doing the mmap's on the
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* host. Since they're very expensive, we want to avoid that as far as
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* possible.
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*/
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if (old != new && (current->flags & PF_BORROWED_MM))
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switch_mm_skas(&new->context.skas.id);
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}
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static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
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struct task_struct *tsk)
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{
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unsigned cpu = smp_processor_id();
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if(prev != next){
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cpu_clear(cpu, prev->cpu_vm_mask);
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cpu_set(cpu, next->cpu_vm_mask);
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if(next != &init_mm)
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switch_mm_skas(&next->context.skas.id);
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}
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}
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static inline void enter_lazy_tlb(struct mm_struct *mm,
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struct task_struct *tsk)
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{
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}
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extern int init_new_context_skas(struct task_struct *task,
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struct mm_struct *mm);
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static inline int init_new_context(struct task_struct *task,
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struct mm_struct *mm)
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{
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return(init_new_context_skas(task, mm));
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}
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extern void destroy_context_skas(struct mm_struct *mm);
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static inline void destroy_context(struct mm_struct *mm)
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{
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destroy_context_skas(mm);
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}
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#endif
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* Emacs will notice this stuff at the end of the file and automatically
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* adjust the settings for this buffer only. This must remain at the end
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* of the file.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-file-style: "linux"
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* End:
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*/
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