From 725fb29fd4bcda958b32f4479ad9934117c22019 Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Fri, 9 Nov 2007 03:51:14 -0600 Subject: [PATCH] [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 --- include/asm-powerpc/tlbflush.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/asm-powerpc/tlbflush.h b/include/asm-powerpc/tlbflush.h index e7b4c0d298ae..5c9108147644 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, -- 2.20.1