Waiman Long <longman@xxxxxxxxxx> wrote: > > diff --git a/kernel/padata.c b/kernel/padata.c > index 53f4bc912712..0fa6c2895460 100644 > --- a/kernel/padata.c > +++ b/kernel/padata.c > @@ -517,6 +517,13 @@ void __init padata_do_multithreaded(struct padata_mt_job *job) > ps.chunk_size = max(ps.chunk_size, job->min_chunk); > ps.chunk_size = roundup(ps.chunk_size, job->align); > > + /* > + * chunk_size can be 0 if the caller sets min_chunk to 0. So force it > + * to at least 1 to prevent divide-by-0 panic in padata_mt_helper().` > + */ > + if (!ps.chunk_size) > + ps.chunk_size = 1U; Perhaps change the first ps.chunk_size assignment to use DIV_ROUND_UP instead? Thanks, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
