Hi Perr, On Mon, Oct 16, 2017 at 11:54:47PM +0800, Perr Zhang wrote: > Why should we use the function max() on 'start' and 'vma->vm_start'? > Could the 'start' be less than 'vma->vm_start'? If it is so, isn't it > wrong to just return vma->vm_start but report an error? The vma_address() function was recently changed in commit a8fa41ad2f6f7. In the previous version, having the return value of __vma_address() lower than vma->vm_start was actually triggering a VM_BUG_ON_VMA. Taking a look at this commit and understanding why such changes had to be done might help you find an answer to your question :) -- Thibaut SAUTEREAU _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
