Re: find_vma_intersection

[Mark Hounschell <dmarkh@cfl.rr.com>]

Mark Hounschell wrote:
> Can someone enlighten me as to what it really means when  a user land
> shmat call, in which the virtual address is provided, fails in the
> kernel find_vma_intersection function because
> 
>   end_addr(of my SHM) is <= vma->vm_start?

Actually because its ! <= vma->vm_start.

> 
> static inline struct vm_area_struct * find_vma_intersection(struct
> mm_struct * mm, unsigned long start_addr, unsigned long end_addr)
> {
>         struct vm_area_struct * vma = find_vma(mm,start_addr);
> 
>         if (vma && end_addr <= vma->vm_start)
>                 vma = NULL;
>         return vma;
> }
> 

Thanks
Mark