linux-kernel - Re: [PATCH] CIFS: SMBD: fix configurations with INFINIBAND=m

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Date:   Tue, 19 Dec 2017 13:39:15 +0100
From:   Jean Delvare <jdelvare@...e.de>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Steve French <sfrench@...ba.org>,
        Pavel Shilovsky <pshilov@...rosoft.com>,
        Long Li <longli@...rosoft.com>, linux-cifs@...r.kernel.org,
        samba-technical@...ts.samba.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] CIFS: SMBD: fix configurations with INFINIBAND=m

On Tue, 19 Dec 2017 11:12:57 +0100, Arnd Bergmann wrote:
> A built-in SMB file system cannot link against a modular
> infiniband core module:
> 
> fs/cifs/smbdirect.o: In function `smbd_destroy_rdma_work':
> smbdirect.c:(.text+0x28e3): undefined reference to `ib_drain_qp'
> smbdirect.c:(.text+0x2915): undefined reference to `rdma_destroy_qp'
> smbdirect.c:(.text+0x2d08): undefined reference to `ib_free_cq'
> smbdirect.c:(.text+0x2d3d): undefined reference to `ib_free_cq'
> smbdirect.c:(.text+0x2d6f): undefined reference to `ib_dealloc_pd'
> smbdirect.c:(.text+0x2d9a): undefined reference to `rdma_destroy_id'
> fs/cifs/smbdirect.o: In function `smbd_disconnect_rdma_work':
> smbdirect.c:(.text+0x3d3e): undefined reference to `rdma_disconnect'
> fs/cifs/smbdirect.o: In function `_smbd_get_connection':
> smbdirect.c:(.text+0x5bc2): undefined reference to `rdma_create_id'
> smbdirect.c:(.text+0x5cc5): undefined reference to `rdma_resolve_addr'
> smbdirect.c:(.text+0x5cda): undefined reference to `rdma_destroy_id'
> smbdirect.c:(.text+0x5da7): undefined reference to `rdma_destroy_id'
> smbdirect.c:(.text+0x5e89): undefined reference to `rdma_resolve_route'
> smbdirect.c:(.text+0x5f07): undefined reference to `rdma_destroy_id'
> 
> This changes the Kconfig dependency to enforce selecting one of the
> valid configurations.
> 
> Fixes: bbc50d2ad317 ("CIFS: SMBD: Introduce kernel config option CONFIG_CIFS_SMB_DIRECT")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  fs/cifs/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig
> index 500fd69fb58b..3bfc55c08bef 100644
> --- a/fs/cifs/Kconfig
> +++ b/fs/cifs/Kconfig
> @@ -199,6 +199,7 @@ config CIFS_SMB311
>  config CIFS_SMB_DIRECT
>  	bool "SMB Direct support (Experimental)"
>  	depends on CIFS && INFINIBAND
> +	depends on CIFS=m || INFINIBAND=y
>  	help
>  	  Enables SMB Direct experimental support for SMB 3.0, 3.02 and 3.1.1.
>  	  SMB Direct allows transferring SMB packets over RDMA. If unsure,

Looks good to me.

Reviewed-by: Jean Delvare <jdelvare@...e.de>

-- 
Jean Delvare
SUSE L3 Support