Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=725fb29fd4bcda958b32f4479ad9934117c22019
Commit: 725fb29fd4bcda958b32f4479ad9934117c22019
Parent: 4c011b1fb853776459c7d3d7de7b14fa41f28c46
Author: Kumar Gala <[EMAIL PROTECTED]>
AuthorDate: Fri Nov 9 03:51:14 2007 -0600
Committer: Kumar Gala <[EMAIL PROTECTED]>
CommitDate: Fri Nov 9 03:51:14 2007 -0600
[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 <[EMAIL PROTECTED]>
---
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,
-
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