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Task
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Resolution: Unresolved
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Normal
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None
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5
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False
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False
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For the purpose of enabling a configuration option for a requested device driver in https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/3854, I added some new config files to the kernel repo:
```patch
diff --git a/redhat/configs/rhel/generic/CONFIG_BT_HCIUART_QCA b/redhat/configs/rhel/generic/CONFIG_BT_HCIUART_QCA
new file mode 100644
index 000000000000..59d4f58cb0e7
— /dev/null
+++ b/redhat/configs/rhel/generic/CONFIG_BT_HCIUART_QCA
@@ -0,0 +1 @@
+CONFIG_BT_HCIUART_QCA=y
diff --git a/redhat/configs/rhel/generic/CONFIG_BT_QCA b/redhat/configs/rhel/generic/CONFIG_BT_QCA
new file mode 100644
index 000000000000..8eff84da60dc
— /dev/null
+++ b/redhat/configs/rhel/generic/CONFIG_BT_QCA
@@ -0,0 +1 @@
+CONFIG_BT_QCA=m
```
But the CKI CI tests would not build those drivers at all. It took me a while to realise that there were configuration dependencies missing:
```
config BT_HCIUART_QCA
bool "Qualcomm Atheros protocol support"
depends on BT_HCIUART
depends on BT_HCIUART_SERDEV
select BT_HCIUART_H4
select BT_QCA
help
The Qualcomm Atheros protocol supports HCI In-Band Sleep feature
over serial port interface(H4) between controller and host.
This protocol is required for UART clock control for QCA Bluetooth
devices.
Say Y here to compile support for QCA protocol.
```
Manually finding and enabling the configuration option in `make menuconfig` showed the missing configuration option:
```
+CONFIG_BT_HCIUART_SERDEV=y
```
I would expect `process_configs.sh`/`make dist-configs` to warn about enabled (`m` or `y`) CONFIG options that don't actually end up being enabled in the builds because a dependency was never enabled, or a new dependency appeared that silently disabled the configuration option.