Florian Fainelli wrote:

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Since you have a check on CONFIG_QCOM_EMAC in emac/Makefile, you could
always recurse into that directory while building (use obj-y).

Obviously, having "obj-$(CONFIG_QCOM_EMAC)" in both Makefiles is
redundant, but wouldn't it make more sense to change
"obj-$(CONFIG_QCOM_EMAC)" to "obj-y" in
drivers/net/ethernet/qualcomm/emac/Makefile, so that I only recurse if
necessary?

Whichever makes the most sense, when there is a directory involved, my
preference is to always recurse in that directory and selectively
compile from there, since the Kconfig/Makefile options are all located
within the same hierarchical level, just a preference.

It turns out that the way I changed it in v9 prevents the driver from 
being built as a module.  I changed the wrong Makefile.  I will have to 
post a v10.

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