linux-kernel - Re: [PATCH 2/4] RDMA/i40iw: Remove use of kmap()

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Message-ID: <20210622121406.GM1096940@ziepe.ca>
Date:   Tue, 22 Jun 2021 09:14:06 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     ira.weiny@...el.com
Cc:     Mike Marciniszyn <mike.marciniszyn@...nelisnetworks.com>,
        Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>,
        Doug Ledford <dledford@...hat.com>,
        Faisal Latif <faisal.latif@...el.com>,
        Shiraz Saleem <shiraz.saleem@...el.com>,
        Bernard Metzler <bmt@...ich.ibm.com>,
        Kamal Heib <kheib@...hat.com>, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] RDMA/i40iw: Remove use of kmap()

On Mon, Jun 21, 2021 at 11:14:20PM -0700, ira.weiny@...el.com wrote:
> From: Ira Weiny <ira.weiny@...el.com>
> 
> kmap() is being deprecated and will break uses of device dax after PKS
> protection is introduced.[1]
> 
> The kmap() used in the i40iw CM driver is thread local.  Therefore
> kmap_local_page() sufficient to use and may provide performance benefits
> as well.  kmap_local_page() will work with device dax and pgmap
> protected pages.
> 
> Use kmap_local_page() instead of kmap().
> 
> [1] https://lore.kernel.org/lkml/20201009195033.3208459-59-ira.weiny@intel.com/
> 
> Signed-off-by: Ira Weiny <ira.weiny@...el.com>
> ---
>  drivers/infiniband/hw/i40iw/i40iw_cm.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)

This needs to be resent against irdma instead

Jason