On Sat 30-06-18 06:39:43, Yang Shi wrote: > Introduces two new helper functions: > * munmap_addr_sanity() > * munmap_lookup_vma() > > They will be used by do_munmap() and the new do_munmap with zapping > large mapping early in the later patch. > > There is no functional change, just code refactor. There are whitespace changes which make the code much harder to review than necessary. > +static inline bool munmap_addr_sanity(unsigned long start, size_t len) > { > - unsigned long end; > - struct vm_area_struct *vma, *prev, *last; > + if ((offset_in_page(start)) || start > TASK_SIZE || len > TASK_SIZE - start) > + return false; > > - if ((offset_in_page(start)) || start > TASK_SIZE || len > TASK_SIZE-start) > - return -EINVAL; e.g. here. -- Michal Hocko SUSE Labs