On Mon 12 Sep 02:58 PDT 2016, Arnd Bergmann wrote:

> The ARM allmodconfig build broke with the addition of the SMD rpmsg
> driver that conflicts with the driver its replaces:
> 
> WARNING: drivers/soc/qcom/smd: 'qcom_smd_register_edge' exported twice. 
> Previous export was in drivers/rpmsg/qcom_smd.ko
> WARNING: drivers/soc/qcom/smd: 'qcom_smd_unregister_edge' exported twice. 
> Previous export was in drivers/rpmsg/qcom_smd.ko
> 
> There is already a dependency that is meant to avoid the broken
> configuration, but that only prevents the case where at least
> one of the two are built-in, but not if both are modules.
> 
> This changes the dependency to "=n", to ensure that the new driver
> can only be enabled if the other one is completely disabled.
> 
> Signed-off-by: Arnd Bergmann <[email protected]>
> Fixes: 53e2822e56c7 ("rpmsg: Introduce Qualcomm SMD backend")
> ---
>  drivers/rpmsg/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig
> index 9ba5a2e5c930..de31c5f14dd9 100644
> --- a/drivers/rpmsg/Kconfig
> +++ b/drivers/rpmsg/Kconfig
> @@ -7,7 +7,7 @@ config RPMSG
>  config RPMSG_QCOM_SMD
>       tristate "Qualcomm Shared Memory Driver (SMD)"
>       depends on QCOM_SMEM
> -     depends on !QCOM_SMD
> +     depends on QCOM_SMD=n
>       select RPMSG
>       help
>         Say y here to enable support for the Qualcomm Shared Memory Driver

Of course, time to study this grammar again...

Thanks,
Bjorn

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