Messages in this thread | | | Date | Thu, 30 Jul 2020 15:33:43 +0200 | From | peterz@infradea ... | Subject | Re: [PATCH v3 4/4] objtool: orc_gen: Move orc_entry out of instruction structure |
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On Thu, Jul 30, 2020 at 01:40:48PM +0100, Julien Thierry wrote: > > > On 7/30/20 11:03 AM, peterz@infradead.org wrote: > > On Thu, Jul 30, 2020 at 10:41:43AM +0100, Julien Thierry wrote: > > > One orc_entry is associated with each instruction in the object file, > > > but having the orc_entry contained by the instruction structure forces > > > architectures not implementing the orc subcommands to provide a dummy > > > definition of the orc_entry.
> I guess I forgot about the usecase of running objtool on vmlinux...
Right, and LTO builds will even do ORC at that level.
> On a kernel build for x86_64 defconfig, the difference in time seems to be > withing the noise.
Good.
> But I agree the proposed code is not ideal and on the other we've tried > avoiding #ifdef in the code. Ideally I'd have an empty orc_entry definition > when SUBCMD_ORC is not implemented. > > Would you have a suggested approach to do that?
How ugly is having that:
struct orc_entry { };
?
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