libata: make SFF support optional

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Now that SFF support is completely separated out from the core layer,
it can be made optional.  Add CONFIG_ATA_SFF and let SFF drivers
depend on it.  If CONFIG_ATA_SFF isn't set, all codes in libata-sff.c
and data structures for SFF support are disabled.  This saves good
number of bytes for small systems.

Signed-off-by: Tejun Heo <htejun@gmail.com>

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Tejun Heo 2008-04-07 22:47:21 +09:00 • committed by Jeff Garzik

parent 350756f6da

commit 127102aea2

6 changed files with 46 additions and 19 deletions

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include/linux/libata.h

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