[PATCH v3 1/2] init/do_mounts.c: ignore final \n in name_to_dev_t

[Sebastian Capella]

Quoting Sebastian Capella (2013-10-03 14:42:46)
> Quoting Andrew Morton (2013-10-03 14:15:23)
> > On Thu,  3 Oct 2013 14:10:37 -0700 Sebastian Capella <sebastian.capella at linaro.org> wrote:
> > 
> > > Enhance name_to_dev_t to handle trailing newline characters
> > > on device paths.  Some inputs to name_to_dev_t may come from
> > > userspace where oftentimes a '\n' is appended to the path.
> > > Added const to the name buffer in both the function
> > > declaration and the prototype to reflect input buffer
> > > handling.
> > > 
> > > By handling trailing newlines in name_to_dev_t, userspace
> > > buffers may be directly passed to name_to_dev_t without
> > > modification.
> > 
> > We have lib/string.c:strim() - perhaps this patch would be
> > neater if it were to use it?
> 
> Hi Morton,
> 
> I was intending to respect the const handling of the input buffer.
> 
> The actual buffer in this case is not really const as it comes from
> the file buffering, but removing the const requires changing the
> store function defined in the kobj_attribute, and would propagate
> to many areas in the kernel.
> 
> Modifying the buffer and removing the const was also suggested by Pavel.
> After some discussion I posted this version which did not change the
> buffer or the prototype.
> 
> Please let me know if the preference is to modify the store function
> definition.
> 
> I'll prepare a patchset that removes the consts to see how much is
> changed.
> 
> Thanks,
> 
> Sebastian

Hi Andrew,

Sorry for calling you Morton earlier.

I looked into removing the const from the store function, but I'm not sure
this is the right idea, so I'm going to shelf that for now.

Please let me know your thoughts.

Thanks,

Sebastian