Name internal functions with less generic names

[joolzg]

Summary

Just spent ages trying to track down a crash in zephyr master.

Finally found the culprit and it was the idle task being overwritten by a variable i created.

Renaming my variable to idle_data and voila the system is working again.

I got no link errors or warnings.

Describe the solution you'd like

Name all internal tasks/stacks to something a bit more precise for example idle becomes idle_task

Alternatives

No response

Additional Context

No response

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[pdgendt]

Can you provide a bit more details about which variable appears to be global?

[joolzg]

idle.c and the idle task.

I added a variable "uint8_t idle[256]" in my code and this is what caused the program to crash.

As i said no warnings when building.

[pdgendt]

CC @nashif @carlescufi
Anything we should do here wrt public vs private naming?