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> struct multicall_entry entries[MC_BATCH]; > -#if MC_DEBUG > - struct multicall_entry debug[MC_BATCH]; > - void *caller[MC_BATCH]; > -#endif > unsigned char args[MC_ARGS]; > struct callback { > void (*fn)(void *); > @@ -50,13 +46,84 @@ struct mc_buffer { > } callbacks[MC_BATCH]; > }; > > +struct mc_debug_data { > + struct multicall_entry debug[MC_BATCH]; 'entries'? It's a mc_debug_data's copy of mc_buffer's entries. Also, would it be better to keep these fields as a struct of scalars and instead have the percpu array of this struct? Otherwise there is a whole bunch of [MC_BATCH] arrays, all of them really indexed by the same value. (And while at it, there is no reason to have callbacks[MC_BATCH] sized like that -- it has nothing to do with batch size and can probably be made smaller) > + void *caller[MC_BATCH]; > + size_t argsz[MC_BATCH]; > +}; > + > static DEFINE_PER_CPU(struct mc_buffer, mc_buffer); > +static struct mc_debug_data __percpu *mc_debug_data; > +static struct mc_debug_data mc_debug_data_early __initdata; How about (I think this should work): static struct mc_debug_data __percpu *mc_debug_data __refdata = &mc_debug_data_early; Then you won't need get_mc_debug_ptr(). -boris