linux-kernel - Re: [PATCH v2] infiniband: mlx5: fix build errors when INFINIBAND_USER

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Date:   Tue, 17 Apr 2018 19:30:40 -0600
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Matan Barak <matanb@...lanox.com>,
        Leon Romanovsky <leonro@...lanox.com>,
        Doug Ledford <dledford@...hat.com>
Subject: Re: [PATCH v2] infiniband: mlx5: fix build errors when
 INFINIBAND_USER_ACCESS=m

On Mon, Apr 16, 2018 at 06:51:50PM -0700, Randy Dunlap wrote:
> From: Randy Dunlap <rdunlap@...radead.org>
> 
> Fix build errors when INFINIBAND_USER_ACCESS=m and MLX5_INFINIBAND=y.
> The build error occurs when the mlx5 driver code attempts to use
> USER_ACCESS interfaces, which are built as a loadable module.
> 
> Fixes these build errors:
> 
> drivers/infiniband/hw/mlx5/main.o: In function `populate_specs_root':
> ../drivers/infiniband/hw/mlx5/main.c:4982: undefined reference to `uverbs_default_get_objects'
> ../drivers/infiniband/hw/mlx5/main.c:4994: undefined reference to `uverbs_alloc_spec_tree'
> drivers/infiniband/hw/mlx5/main.o: In function `depopulate_specs_root':
> ../drivers/infiniband/hw/mlx5/main.c:5001: undefined reference to `uverbs_free_spec_tree'
> 
> Build-tested with multiple config combinations.
> 
> Reported-by: kbuild test robot <lkp@...el.com>
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Cc: Matan Barak <matanb@...lanox.com>
> Cc: Jason Gunthorpe <jgg@...lanox.com>
> Cc: Leon Romanovsky <leonro@...lanox.com>
> Cc: Doug Ledford <dledford@...hat.com>
> Cc: linux-rdma@...r.kernel.org
> Cc: stable@...r.kernel.org # reported against 4.16
> ---
> v2: allow building mxl5 even when INFINIBAND_USER_ACCESS is disabled.
> 
>  drivers/infiniband/hw/mlx5/Kconfig |    1 +
>  1 file changed, 1 insertion(+)

I added a

Fixes: 8c84660bb437 ("IB/mlx5: Initialize the parsing tree root without the help of uverbs")

Applied to for-rc thanks

Jason