Re: [PATCH 3/6] lib/bucket_locks: use kvmalloc_array()

[Michal Hocko]

On Thu 31-05-18 10:01:51, Linus Torvalds wrote:
> On Wed, May 30, 2018 at 2:42 AM Michal Hocko <mhocko@xxxxxxxxxx> wrote:
> >
> > That being sad, if you believe that silently fixing up a code like that
> > is a good idea we can do the following of course:
> 
> Ack.
> 
> Except for:
> 
> > Linus argues that this just motivates people to do even
> > more hacks like
> >         if (gfp == GFP_KERNEL)
> >                 kvmalloc
> >         else
> >                 kmalloc
> >
> > I haven't seen this happening but it is true that we can grow those in
> > future.
> 
> This whole discussion came from the fact that YES, THIS IS ACTUALLY HAPPENING.
> 
> See lib/bucket_locks.c - it just uses gfpflags_allow_blocking()
> instead of explicitly checking for GFP_KERNEL (probably because the
> only two cases it actually deals with is GFP_ATOMIC and GFP_KERNEL).

OK, I haven't noticed this one and will fix it up. So what about the
following?