Re: [PATCH] soc: qcom: smem: Add stubs for CONFIG_QCOM_SMEM=n

[Daniel Baluta <daniel.baluta@oss.nxp.com>]

On 8/11/26 16:53, Dmitry Baryshkov wrote:
> On Tue, Aug 11, 2026 at 03:31:03PM +0300, Daniel Baluta wrote:
>> drivers/soc/qcom/ubwc_config.c calls qcom_smem_is_available() and
>> qcom_smem_dram_get_hbb() unconditionally. These symbols are provided
>> by the QCOM_SMEM module, but QCOM_UBWC_CONFIG can be selected by
>> DRM_MSM even on non-Qcom platforms (e.g. with SOC_IMX5) thus resulting
>> in the following link error:
>>
>>   arm-linux-gnueabihf-ld: ubwc_config.c:(.text+0x2c): undefined
>>       reference to 'qcom_smem_is_available'
>>   arm-linux-gnueabihf-ld: ubwc_config.c:(.text+0x4c): undefined
>>       reference to 'qcom_smem_dram_get_hbb'
>>
>> Add static inline stub definitions for the !CONFIG_QCOM_SMEM case for
>> all `qcom_smem_` functions in order to fix the issue above.
>>
>> Fixes: 1b445022d1d0 ("soc: qcom: ubwc: Get HBB from SMEM")
>> Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
>> ---
>>  include/linux/soc/qcom/smem.h | 51 +++++++++++++++++++++++++++++++++++
>>  1 file changed, 51 insertions(+)
> 
> I think a proper fix would be to relax drm/msm dependency on UBWC_CONFIG
> (limiting it to ARM64 && ARCH_QCOM) and letting UBWC_CONFIG have strict
> dependency on QCOM_SMEM. WDYT?
> 

Yes, that would work.