Re: [PATCH] kprobes: Enable tracing for mololithic kernel images

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On Thu, Jun 09, 2022 at 08:47:38AM +0100, Russell King (Oracle) wrote:
> On Wed, Jun 08, 2022 at 02:59:27AM +0300, Jarkko Sakkinen wrote:
> > diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
> > index 553866751e1a..d2bb954cd54f 100644
> > --- a/arch/arm/kernel/Makefile
> > +++ b/arch/arm/kernel/Makefile
> > @@ -44,6 +44,11 @@ obj-$(CONFIG_CPU_IDLE)		+= cpuidle.o
> >  obj-$(CONFIG_ISA_DMA_API)	+= dma.o
> >  obj-$(CONFIG_FIQ)		+= fiq.o fiqasm.o
> >  obj-$(CONFIG_MODULES)		+= armksyms.o module.o
> > +ifeq ($(CONFIG_MODULES),y)
> > +obj-y				+= module_alloc.o
> > +else
> > +obj-$(CONFIG_KPROBES)		+= module_alloc.o
> > +endif
> 
> Doesn't:
> 
> obj-$(CONFIG_MODULES)		+= module_alloc.o
> obj-$(CONFIG_KPROBES)		+= module_alloc.o
> 
> work just as well? The kbuild modules.rst documentation says:
> 
>         The order of files in $(obj-y) is significant.  Duplicates in
>         the lists are allowed: the first instance will be linked into
>         built-in.a and succeeding instances will be ignored.
> 
> so you should be fine... or the documentation is wrong!

OK, I did not know this. Thanks for the tip!

BR, Jarkko



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