Messages in this thread | | | Date | Sat, 17 Sep 2011 09:58:18 +0100 | From | Russell King <> | Subject | Re: [PATCH] ARM: tlb: Compile out MULTI_TLB specific code when MULTI_TLB is undefined |
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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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