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authorKumar Gala <galak@kernel.crashing.org>2007-11-09 03:51:14 -0600
committerKumar Gala <galak@kernel.crashing.org>2007-11-09 03:51:14 -0600
commit725fb29fd4bcda958b32f4479ad9934117c22019 (patch)
tree85d8760fca2aaa32e22d40de3930626ce1186d44
parent4c011b1fb853776459c7d3d7de7b14fa41f28c46 (diff)
[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>
-rw-r--r--include/asm-powerpc/tlbflush.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-powerpc/tlbflush.h b/include/asm-powerpc/tlbflush.h
index e7b4c0d298a..5c910814764 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,