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sh: Handle a NULL vma in __update_tlb() for the fast-path. 

The TLB miss fast-path presently calls in to update_mmu_cache() to
set up the entry, and does so with a NULL vma. Check for vma validity
in the __update_tlb() ptrace checks.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-07-29 22:06:58 +09:00
parent 9cef749269
commit 3ed6e12939
3 changed files with 3 additions and 3 deletions
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2
arch/sh/mm/tlb-pteaex.c
View File

@ -23,7 +23,7 @@ void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
/*
* Handle debugger faulting in for debugee.
*/
if (current->active_mm != vma->vm_mm)
if (vma && current->active_mm != vma->vm_mm)
return;
local_irq_save(flags);

2
arch/sh/mm/tlb-sh3.c
View File

@ -34,7 +34,7 @@ void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
/*
* Handle debugger faulting in for debugee.
*/
if (current->active_mm != vma->vm_mm)
if (vma && current->active_mm != vma->vm_mm)
return;
local_irq_save(flags);

2
arch/sh/mm/tlb-sh4.c
View File

@ -22,7 +22,7 @@ void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
/*
* Handle debugger faulting in for debugee.
*/
if (current->active_mm != vma->vm_mm)
if (vma && current->active_mm != vma->vm_mm)
return;
local_irq_save(flags);