CRIS v10: Don't call get_mmu_context when switching between tasks with shared memory descriptors
Also, cleanup formatting and fix whitespace errors.
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40316c1fad
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4f073eff3f
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@ -4,7 +4,7 @@
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* Low level TLB handling
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*
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*
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* Copyright (C) 2000-2002 Axis Communications AB
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* Copyright (C) 2000-2007 Axis Communications AB
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*
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* Authors: Bjorn Wesen (bjornw@axis.com)
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*
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@ -39,7 +39,7 @@ flush_tlb_all(void)
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unsigned long flags;
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/* the vpn of i & 0xf is so we dont write similar TLB entries
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* in the same 4-way entry group. details..
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* in the same 4-way entry group. details...
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*/
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local_irq_save(flags);
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@ -96,9 +96,7 @@ flush_tlb_mm(struct mm_struct *mm)
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/* invalidate a single page */
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void
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flush_tlb_page(struct vm_area_struct *vma,
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unsigned long addr)
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void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
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{
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struct mm_struct *mm = vma->vm_mm;
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int page_id = mm->context.page_id;
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@ -172,27 +170,29 @@ init_new_context(struct task_struct *tsk, struct mm_struct *mm)
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/* called in schedule() just before actually doing the switch_to */
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void
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switch_mm(struct mm_struct *prev, struct mm_struct *next,
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struct task_struct *tsk)
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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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/* make sure we have a context */
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if (prev != next) {
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/* make sure we have a context */
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get_mmu_context(next);
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get_mmu_context(next);
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/* remember the pgd for the fault handlers
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* this is similar to the pgd register in some other CPU's.
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* we need our own copy of it because current and active_mm
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* might be invalid at points where we still need to derefer
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* the pgd.
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*/
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/* remember the pgd for the fault handlers
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* this is similar to the pgd register in some other CPU's.
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* we need our own copy of it because current and active_mm
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* might be invalid at points where we still need to derefer
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* the pgd.
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*/
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per_cpu(current_pgd, smp_processor_id()) = next->pgd;
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per_cpu(current_pgd, smp_processor_id()) = next->pgd;
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/* switch context in the MMU */
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/* switch context in the MMU */
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D(printk(KERN_DEBUG "switching mmu_context to %d (%p)\n",
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next->context, next));
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D(printk("switching mmu_context to %d (%p)\n", next->context, next));
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*R_MMU_CONTEXT = IO_FIELD(R_MMU_CONTEXT, page_id, next->context.page_id);
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*R_MMU_CONTEXT = IO_FIELD(R_MMU_CONTEXT,
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page_id, next->context.page_id);
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}
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}
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