[PATCH v3 2.6.39-rc1-tip 15/26] 15: uprobes: Handing int3 and singlestep exception.

[Peter Zijlstra]

On Fri, 2011-04-01 at 20:05 +0530, Srikar Dronamraju wrote:
> +               probept = uprobes_get_bkpt_addr(regs);
> +               down_read(&mm->mmap_sem);
> +               for (vma = mm->mmap; vma; vma = vma->vm_next) {
> +                       if (!valid_vma(vma))
> +                               continue;
> +                       if (probept < vma->vm_start || probept > vma->vm_end)
> +                               continue;
> +                       u = find_uprobe(vma->vm_file->f_mapping->host,
> +                                       probept - vma->vm_start);
> +                       break;
> +               }

Why the linear vma walk? Surely the find_vma() suffices since there can
only be one vma that matches a particular vaddr.

> +               up_read(&mm->mmap_sem);