linux-kernel - Re: [PATCH V2] RDMA/irdma: Remove use of kmap()

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Message-ID: <20210624181332.GB2915863@nvidia.com>
Date:   Thu, 24 Jun 2021 15:13:32 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
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 V2] RDMA/irdma: Remove use of kmap()

On Tue, Jun 22, 2021 at 09:56:22AM -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 irdma CM driver is thread local.  Therefore
> kmap_local_page() is 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>
> ---
> Changes for V2:
> 	Move to the new irdma driver for 5.14
> ---
>  drivers/infiniband/hw/irdma/cm.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)

Applied to for-next, thanks

Jason