Re: [PATCH kernel 2/3] powerpc/llvm: Sample config for LLVM LTO

Alexey Kardashevskiy wrote:

Disables CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT as CONFIG_HAS_LTO_CLANG
depends on it being disabled. In order to avoid disabling way too many
options (like DYNAMIC_FTRACE/FUNCTION_TRACER), this converts
FTRACE_MCOUNT_USE_RECORDMCOUNT from def_bool to bool.

<snip>

+CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT=n

I don't think that will work since we have no other ways of generating 
mcount locations on powerpc. And since we decided to only support 
DYNAMIC_FTRACE, I guess we will need to disable FUNCTION_TRACER to get 
this working, for now.

I am looking into ways to get ftrace working in this scenario.


- Naveen