serial: stm32-usart: use of undefined SERIAL_STM32_USART_CONSOLE

[Andreas Ruprecht]

Hi Maxime,

your commit 48a6092fb41f ("serial: stm32-usart: Add STM32 USART Driver")
was merged into linux-next today (i.e., next-20150615), and contains the
following piece of code:

[...]
#if defined(CONFIG_SERIAL_STM32_USART_CONSOLE) &&
defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
#endif
[...]

The #if block can never be enabled as no symbol named
SERIAL_STM32_USART_CONSOLE is defined in Kconfig. Did you maybe mean
SERIAL_STM32_CONSOLE which you introduce in the same commit?

I detected the issue by running undertaker-checkpatch from the
Undertaker tool suite (https://undertaker.cs.fau.de). There is also a
tool in the Linux tree itself that can detect such issues
(scripts/checkkconfigsymbols.py).

Regards,

Andreas
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