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CRIS v10: Don't call get_mmu_context when switching between tasks with shared memory descriptors

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Also, cleanup formatting and fix whitespace errors.
This commit is contained in:
Jesper Nilsson 2008-01-21 11:28:16 +01:00
parent 40316c1fad
commit 4f073eff3f
1 changed files with 29 additions and 29 deletions
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42
arch/cris/arch-v10/mm/tlb.c
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@ -4,7 +4,7 @@
* Low level TLB handling
*
*
* Copyright (C) 2000-2002 Axis Communications AB
* Copyright (C) 2000-2007 Axis Communications AB
*
* Authors: Bjorn Wesen (bjornw@axis.com)
*
@ -39,7 +39,7 @@ flush_tlb_all(void)
unsigned long flags;
/* the vpn of i & 0xf is so we dont write similar TLB entries
* in the same 4-way entry group. details..
* in the same 4-way entry group. details...
*/
local_irq_save(flags);
@ -96,9 +96,7 @@ flush_tlb_mm(struct mm_struct *mm)
/* invalidate a single page */
void
flush_tlb_page(struct vm_area_struct *vma,
unsigned long addr)
void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
{
struct mm_struct *mm = vma->vm_mm;
int page_id = mm->context.page_id;
@ -172,27 +170,29 @@ init_new_context(struct task_struct *tsk, struct mm_struct *mm)
/* called in schedule() just before actually doing the switch_to */
void
switch_mm(struct mm_struct *prev, struct mm_struct *next,
struct task_struct *tsk)
void switch_mm(struct mm_struct *prev, struct mm_struct *next,
struct task_struct *tsk)
{
/* make sure we have a context */
if (prev != next) {
/* make sure we have a context */
get_mmu_context(next);
get_mmu_context(next);
/* remember the pgd for the fault handlers
* this is similar to the pgd register in some other CPU's.
* we need our own copy of it because current and active_mm
* might be invalid at points where we still need to derefer
* the pgd.
*/
/* remember the pgd for the fault handlers
* this is similar to the pgd register in some other CPU's.
* we need our own copy of it because current and active_mm
* might be invalid at points where we still need to derefer
* the pgd.
*/
per_cpu(current_pgd, smp_processor_id()) = next->pgd;
per_cpu(current_pgd, smp_processor_id()) = next->pgd;
/* switch context in the MMU */
/* switch context in the MMU */
D(printk(KERN_DEBUG "switching mmu_context to %d (%p)\n",
next->context, next));
D(printk("switching mmu_context to %d (%p)\n", next->context, next));
*R_MMU_CONTEXT = IO_FIELD(R_MMU_CONTEXT, page_id, next->context.page_id);
*R_MMU_CONTEXT = IO_FIELD(R_MMU_CONTEXT,
page_id, next->context.page_id);
}
}