Re: [PATCH] RDMA/hfi1: Switch to kvfree_rcu() API

[Jason Gunthorpe <jgg@nvidia.com>]

On Wed, Dec 15, 2021 at 08:47:38PM +0100, Uladzislau Rezki wrote:
> On Wed, Dec 15, 2021 at 12:18:44PM +0100, Uladzislau Rezki (Sony) wrote:
> > Instead of invoking a synchronize_rcu() to free a pointer
> > after a grace period we can directly make use of new API
> > that does the same but in more efficient way.
> > 
> > TO: linux-rdma@vger.kernel.org
> > TO: Jason Gunthorpe <jgg@nvidia.com>
> > TO: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
> > Acked-by: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
> > Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
> >  drivers/infiniband/hw/hfi1/sdma.c | 3 +--
> >  1 file changed, 1 insertion(+), 2 deletions(-)
> > 
> > diff --git a/drivers/infiniband/hw/hfi1/sdma.c b/drivers/infiniband/hw/hfi1/sdma.c
> > index f07d328689d3..7264a35e8f4c 100644
> > +++ b/drivers/infiniband/hw/hfi1/sdma.c
> > @@ -1292,8 +1292,7 @@ void sdma_clean(struct hfi1_devdata *dd, size_t num_engines)
> >  	sdma_map_free(rcu_access_pointer(dd->sdma_map));
> >  	RCU_INIT_POINTER(dd->sdma_map, NULL);
> >  	spin_unlock_irq(&dd->sde_map_lock);
> > -	synchronize_rcu();
> > -	kfree(dd->per_sdma);
> > +	kvfree_rcu(dd->per_sdma);
> >  	dd->per_sdma = NULL;
> >  
> >  	if (dd->sdma_rht) {
> + linux-rdma@vger.kernel.org
> + Jason Gunthorpe <jgg@nvidia.com>
> + Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>

If it is not in the rdma patchworks it won't get applied..

https://patchwork.kernel.org/project/linux-rdma/list/

Jason