if i deselect PCIEPORTBUS, why are iwlwifi PCIE modules still being compiled?

["Robert P. J. Day" <rpjday@crashcourse.ca>]

  quite possibly a silly question (which has never stopped me before),
but in perusing the PCIE code in the kernel source, i was looking for
sample code to demo in a classroom setting and picked on
drivers/net/wireless/iwlwifi/pcie, which i was *assuming* was
PCIE-dependent -- specifically, i was going to demo the Advanced-N
6235 PCIE wifi card on an intel galileo board.

  but i thought it was a bit strange that the pcie/ subdirectory there
doesn't seem to depend on PCIEPORTBUS. as a test, i deselected
PCIEPORTBUS in a configuration and did a rebuild, and the source in
the pcie/ directory was recompiled.

  am i misunderstanding the function of the kernel config variable
PCIEPORTBUS? i notice that .../iwlwifi/Makefile includes the line:

  iwlwifi-objs  += pcie/drv.o pcie/rx.o pcie/tx.o pcie/trans.o

which simply compiles those files with no regard to dependency. can
someone clarify this? thanks.

rday

-- 

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
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