On Mon, Nov 19, 2018 at 9:56 PM Mike Rapoport <rppt@xxxxxxxxxxxxx> wrote: > > On Mon, Nov 19, 2018 at 08:43:09PM +0530, Souptick Joarder wrote: > > Hi Mike, > > > > On Sat, Nov 17, 2018 at 8:07 PM Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote: > > > > > > On Sat, Nov 17, 2018 at 12:26:38PM +0530, Souptick Joarder wrote: > > > > On Fri, Nov 16, 2018 at 11:59 PM Mike Rapoport <rppt@xxxxxxxxxxxxx> wrote: > > > > > > + * vm_insert_range - insert range of kernel pages into user vma > > > > > > + * @vma: user vma to map to > > > > > > + * @addr: target user address of this page > > > > > > + * @pages: pointer to array of source kernel pages > > > > > > + * @page_count: no. of pages need to insert into user vma > > > > > > + * > > > > > > + * This allows drivers to insert range of kernel pages they've allocated > > > > > > + * into a user vma. This is a generic function which drivers can use > > > > > > + * rather than using their own way of mapping range of kernel pages into > > > > > > + * user vma. > > > > > > > > > > Please add the return value and context descriptions. > > > > > > > > > > > > > Sure I will wait for some time to get additional review comments and > > > > add all of those requested changes in v2. > > > > > > You could send your proposed wording now which might remove the need > > > for a v3 if we end up arguing about the wording. > > > > Does this description looks good ? > > > > /** > > * vm_insert_range - insert range of kernel pages into user vma > > * @vma: user vma to map to > > * @addr: target user address of this page > > * @pages: pointer to array of source kernel pages > > * @page_count: number of pages need to insert into user vma > > * > > * This allows drivers to insert range of kernel pages they've allocated > > * into a user vma. This is a generic function which drivers can use > > * rather than using their own way of mapping range of kernel pages into > > * user vma. > > * > > * Context - Process context. Called by mmap handlers. > > Context: > > > * Return - int error value > > Return: > > > * 0 - OK > > * -EINVAL - Invalid argument > > * -ENOMEM - No memory > > * -EFAULT - Bad address > > * -EBUSY - Device or resource busy > > I don't think that elaborate description of error values is needed, just "0 > on success and error code otherwise" would be sufficient. /** * vm_insert_range - insert range of kernel pages into user vma * @vma: user vma to map to * @addr: target user address of this page * @pages: pointer to array of source kernel pages * @page_count: number of pages need to insert into user vma * * This allows drivers to insert range of kernel pages they've allocated * into a user vma. This is a generic function which drivers can use * rather than using their own way of mapping range of kernel pages into * user vma. * * Context: Process context. Called by mmap handlers. * Return: 0 on success and error code otherwise */
