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[POWERPC] Fix oops related to 4xx flush_tlb_page modification 

kmap_atomic calls flush_tlb_page with a NULL VMA and thus we end
up dereferencing a NULL pointer to try and get the context.id.

If the VMA is null use the global pid value of 0.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Kumar Gala 2007-11-09 03:51:14 -06:00
parent 4c011b1fb8
commit 725fb29fd4
1 changed files with 2 additions and 2 deletions
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4
include/asm-powerpc/tlbflush.h
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@ -44,13 +44,13 @@ static inline void flush_tlb_mm(struct mm_struct *mm)
static inline void flush_tlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
_tlbie(vmaddr, vma->vm_mm->context.id);
_tlbie(vmaddr, vma ? vma->vm_mm->context.id : 0);
}
static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
unsigned long vmaddr)
{
_tlbie(vmaddr, vma->vm_mm->context.id);
_tlbie(vmaddr, vma ? vma->vm_mm->context.id : 0);
}
static inline void flush_tlb_range(struct vm_area_struct *vma,