On Jan 22, 2018, at 23:27, NeilBrown <ne...@suse.com> wrote:
>
> When compiled without CONFIG_SMP, we get a compile error
> as ->ctb_parts is not defined.
>
> There is already a function, cfs_cpt_cpumask(), which will get the
> cpumask we need, and which handles the UP case by returning a NULL pointer.
> So use that and handle NULL.
> Also avoid the #ifdef by allocating a cpumask_var and copying
> into it, rather than sharing the mask.
>
> Reported-by: kbuild test robot <fengguang...@intel.com>
> Fixes: 6106c0f82481 ("staging: lustre: lnet: convert selftest to use
> workqueues")
> Signed-off-by: NeilBrown <ne...@suse.com>
Reviewed-by: Andreas Dilger <andreas.dil...@intel.com>
> ---
> drivers/staging/lustre/lnet/selftest/module.c | 17 ++++++++---------
> 1 file changed, 8 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/staging/lustre/lnet/selftest/module.c
> b/drivers/staging/lustre/lnet/selftest/module.c
> index 31a74b48c995..7359aa56d9b3 100644
> --- a/drivers/staging/lustre/lnet/selftest/module.c
> +++ b/drivers/staging/lustre/lnet/selftest/module.c
> @@ -110,7 +110,8 @@ lnet_selftest_init(void)
> lst_init_step = LST_INIT_WI_TEST;
> for (i = 0; i < nscheds; i++) {
> int nthrs = cfs_cpt_weight(lnet_cpt_table(), i);
> - struct workqueue_attrs attrs;
> + struct workqueue_attrs attrs = {0};
> + cpumask_var_t *mask = cfs_cpt_cpumask(lnet_cpt_table(), i);
>
> /* reserve at least one CPU for LND */
> nthrs = max(nthrs - 1, 1);
> @@ -121,14 +122,12 @@ lnet_selftest_init(void)
> rc = -ENOMEM;
> goto error;
> }
> - attrs.nice = 0;
> - #ifdef CONFIG_CPUMASK_OFFSTACK
> - attrs.cpumask = lnet_cpt_table()->ctb_parts[i].cpt_cpumask;
> - #else
> - cpumask_copy(attrs.cpumask,
> lnet_cpt_table()->ctb_parts[i].cpt_cpumask);
> - #endif
> - attrs.no_numa = false;
> - apply_workqueue_attrs(lst_test_wq[i], &attrs);
> +
> + if (mask && alloc_cpumask_var(&attrs.cpumask, GFP_KERNEL)) {
> + cpumask_copy(attrs.cpumask, *mask);
> + apply_workqueue_attrs(lst_test_wq[i], &attrs);
> + free_cpumask_var(attrs.cpumask);
> + }
> }
>
> rc = srpc_startup();
> --
> 2.14.0.rc0.dirty
>
Cheers, Andreas
--
Andreas Dilger
Lustre Principal Architect
Intel Corporation
