Build error while executing tests/kernel/smp on ESP32

[spoorthik]

Describe the bug
A build error is observed stating 'set_kernel_idle_time_in_ticks' defined but not used.

To Reproduce
Steps to reproduce the behavior:

1. Setup build environment for ESP32
2. cd zephyr.git/tests/kernel/smp
3. mkdir build; cd build
4. cmake -DBOARD=esp32 ..
5. make flash
6. See error

Screenshots or console output

zephyr.git/kernel/idle.c:54:13: error: 'set_kernel_idle_time_in_ticks' defined but not used [-Werror=unused-function]

 static void set_kernel_idle_time_in_ticks(s32_t ticks)
             ^
cc1: all warnings being treated as errors
[ 65%] Building C object zephyr/kernel/CMakeFiles/kernel.dir/mempool.c.obj
zephyr/kernel/CMakeFiles/kernel.dir/build.make:88: recipe for target 'zephyr/kernel/CMakeFiles/kernel.dir/idle.c.obj' failed
make[3]: *** [zephyr/kernel/CMakeFiles/kernel.dir/idle.c.obj] Error 1

Environment:

• OS: Linux
• Toolchain: Zephyr SDK, ESP32 toolchain
• Commit SHA or Version used: 99aadec

[andyross]

Yeah, I dropped a patch somewhere. @dcpleung reported that esp32 doesn't build earlier (and I blew him off while dealing with timer stuff -- should have listened more carefully, sorry!), and in fact qemu_x86_64 remains blacklisted on that test when I know it was working.

Will fix.

[spoorthik]

#13042 has fixed the build error. The issue can be closed.