On Wed, 14 Jan 2009 16:32:55 +0100 Sam Ravnborg <sam@xxxxxxxxxxxx> wrote: > On Tue, Jan 13, 2009 at 11:59:40PM -0800, Andrew Morton wrote: > > On Tue, 13 Jan 2009 22:38:01 -0500 Robert Reif <reif@xxxxxxxxxxxxx> wrote: > > > > > This worked: > > > > > > diff --git a/kernel/Makefile b/kernel/Makefile > > > index 2aebc4c..368227d 100644 > > > --- a/kernel/Makefile > > > +++ b/kernel/Makefile > > > @@ -43,8 +43,10 @@ obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o > > > ifeq ($(CONFIG_USE_GENERIC_SMP_HELPERS),y) > > > obj-y += smp.o > > > else > > > +ifneq ($(CONFIG_SMP),y) > > > obj-y += up.o > > > endif > > > +endif > > > obj-$(CONFIG_SMP) += spinlock.o > > > obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o > > > obj-$(CONFIG_PROVE_LOCKING) += spinlock.o > > > > This all can be simplified, can't it? > > > > obj-$(CONFIG_USE_GENERIC_SMP_HELPERS) += smp.o > > ifneq ($(CONFIG_SMP),y) > > obj-y += up.o > > endif > > > > (someone please check my homework - I don't have a good track > > record here ;)) > > Looks correct. We pull in smp.o only for SPARC64 AND SMP SPARC64=n and SMP, actually (assuming sparc64 is the only USE_GENERIC_SMP_HELPERS=n arch) > But I find the next lines distastefull in a Makefile: > > ifneq ($(CONFIG_SMP),y) > > obj-y += up.o > > endif me too. > I would prefer a small Kconfig helper symbol: > > config SPARC_UP > def_bool y > depends on !SMP > > And then we would do the Makefile bits like this: > obj-$(CONFIG_SPARC_UP) += up.o eek. Mentioning sparc explicitly in kernel/Makefile is badder. we could remove zillions of these conditionals if something somewhere were to generate negated symbols for us. Say, when kbuild sees CONFIG_SMP=y, it will generate another symbol: NOT_CONFIG_SMP=y. So then we can do obj-$NOT_CONFIG_SMP += up.o Or is that too cheesy? -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
