Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 725fb29f authored by Kumar Gala's avatar Kumar Gala
Browse files

[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: default avatarKumar Gala <galak@kernel.crashing.org>
parent 4c011b1f

include/asm-powerpc/tlbflush.h

+2 −2
Original line number Diff line number Diff line
@@ -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,