Re: [PATCH] ARM: tlb: Compile out MULTI_TLB specific code whenMULTI_TLB is undefined

[Russell King]

On Sat, Sep 17, 2011 at 11:19:02AM +0800, Tzu-Jung Lee wrote:
> Indeed, this is only one of the places where we used to particularly
> build with higher optimization level. More than often, we only disable
> the optimization for interested object files with CFLAGS_foo.o += -g
> -O0. While porting kernel to different platforms, however, failures at
> the early booting stage usually makes low level
> initialization(mm/tlb/cache/cpu...) become the objects that we want to
> disable the optimization for the ease of diagnostic with source level
> debugger. In this cases, patches to the source code become required to
> get the -O0 work for them. Would you consider to have these patches
> merged if they doesn't have side effect.

We've gone some 17 or so years without needing -O0 to debug the kernel.
Why has it now become necessary?

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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