On Tue, 2 Jan 2018, Ard Biesheuvel wrote: > To allow existing C code to be incorporated into the decompressor or > the UEFI stub, introduce a CPP macro that turns all EXPORT_SYMBOL_xxx > declarations into nops, and #define it in places where such exports > are undesirable. Note that this gets rid of a rather dodgy redefine > of linux/export.h's header guard. [...] > --- a/include/linux/export.h > +++ b/include/linux/export.h > @@ -83,6 +83,15 @@ extern struct module __this_module; > */ > #define __EXPORT_SYMBOL(sym, sec) === __KSYM_##sym === > > +#elif defined(__DISABLE_EXPORTS) > + > +/* > + * Allow symbol exports to be disabled completely so that C code may > + * be reused in other execution contexts such as the UEFI stub or the > + * decompressor. > + */ > +#define __EXPORT_SYMBOL(sym, sec) > + I think you should rather put this first thing in the #if sequence so to override the defined(__KSYM_DEPS__) case too. No need to create build dependencies for module symbols that you're going to stub out afterwards anyway. Nicolas
