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| author | Kumar Gala <galak@kernel.crashing.org> | 2007-11-09 03:51:14 -0600 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2007-11-09 03:51:14 -0600 |
| commit | 725fb29fd4bcda958b32f4479ad9934117c22019 (patch) | |
| tree | 85d8760fca2aaa32e22d40de3930626ce1186d44 /include/asm-powerpc/tlbflush.h | |
| parent | 4c011b1fb853776459c7d3d7de7b14fa41f28c46 (diff) | |
| download | op-kernel-dev-725fb29fd4bcda958b32f4479ad9934117c22019.zip op-kernel-dev-725fb29fd4bcda958b32f4479ad9934117c22019.tar.gz | |
[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>
Diffstat (limited to 'include/asm-powerpc/tlbflush.h')
| -rw-r--r-- | include/asm-powerpc/tlbflush.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-powerpc/tlbflush.h b/include/asm-powerpc/tlbflush.h index e7b4c0d..5c91081 100644 --- a/include/asm-powerpc/tlbflush.h +++ b/include/asm-powerpc/tlbflush.h @@ -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, |
