Re: [PATCH] firmware: qcom: scm: fold tzmem into the qcom-scm module

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 7/13/26 6:58 AM, Sumit Garg wrote:
> From: Sumit Garg <sumit.garg@oss.qualcomm.com>
> 
> qcom_scm and qcom_tzmem have a mutual symbol dependency: qcom_tzmem
> calls qcom_scm_shm_bridge_{enable,create,delete}() while qcom_scm
> calls qcom_tzmem_{alloc,free,to_phys}() and qcom_scm_get_tzmem_pool().
> When both are built as modules this results in a circular module
> dependency and depmod fails:
> 
>   depmod: ERROR: Cycle detected: qcom_scm -> qcom_tzmem -> qcom_scm
> 
> QCOM_TZMEM is an invisible tristate that is only ever selected by
> QCOM_SCM, so the two are always enabled together. Build qcom_tzmem.o
> as part of the qcom-scm composite module instead of as a separate
> module. This breaks the cycle since the mutual symbol references
> become intra-module.
> 
> With tzmem now internal to qcom-scm, the shm_bridge helpers are no
> longer used outside the module, so drop their EXPORT_SYMBOL_GPL() and
> move the declarations from the public header to the private one,
> alongside qcom_scm_shm_bridge_enable().
> 
> Reported-by: kernel test robot <lkp@intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202607122327.3zkZCUaB-lkp@intel.com/
> Assisted-by: Copilot:claude-opus-4.8
> Signed-off-by: Sumit Garg <sumit.garg@oss.qualcomm.com>
> ---
>  drivers/firmware/qcom/Makefile         | 2 +-
>  drivers/firmware/qcom/qcom_scm.c       | 3 ---
>  drivers/firmware/qcom/qcom_scm.h       | 4 ++++
>  include/linux/firmware/qcom/qcom_scm.h | 5 -----
>  4 files changed, 5 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/firmware/qcom/Makefile b/drivers/firmware/qcom/Makefile
> index 48801d18f37b..55751d282689 100644
> --- a/drivers/firmware/qcom/Makefile
> +++ b/drivers/firmware/qcom/Makefile
> @@ -5,7 +5,7 @@
>  
>  obj-$(CONFIG_QCOM_SCM)		+= qcom-scm.o
>  qcom-scm-objs += qcom_scm.o qcom_scm-smc.o qcom_scm-legacy.o
> -obj-$(CONFIG_QCOM_TZMEM)	+= qcom_tzmem.o
> +qcom-scm-$(CONFIG_QCOM_TZMEM)	+= qcom_tzmem.o

Does it make sense to squash the kconfig entries too now?

Konrad