Thinning out GENERIC

[Sean Bruno]

On 02/13/17 11:33, John Baldwin wrote:
> On Monday, February 13, 2017 10:51:36 AM Warner Losh wrote:
>> [[ It isn't just GENERIC, it's in every single kernel ]]
>>
>> On Sun, Feb 12, 2017 at 7:59 AM, Sean Bruno <sbruno at freebsd.org> wrote:
>>> Index: sys/conf/files
>>> ===================================================================
>>> --- sys/conf/files      (revision 313683)
>>> +++ sys/conf/files      (working copy)
>>> @@ -2419,7 +2419,7 @@
>>>  dev/pci/pci_user.c             optional pci
>>>  dev/pci/pcib_if.m              standard
>>>  dev/pci/pcib_support.c         standard
>>> -dev/pci/vga_pci.c              optional pci
>>> +#dev/pci/vga_pci.c             optional pci
>>>  dev/pcn/if_pcn.c               optional pcn pci
>>>  dev/pdq/if_fea.c               optional fea eisa
>>>  dev/pdq/if_fpa.c               optional fpa pci
>>>
>>> I'm playing around with small x86 builds and wanted to come up with a
>>> knob that disables the vga_pci driver.  Obviously I still want pci(4) to
>>> be enabled, but I definitely do not need the vga interfaces for
>>> anything.  Any suggestions?
>>
>> You could make it dependent on vt or sc as well as pci, no?
> 
> This is a fairly small driver:
> 
>      6139      340         8      6487     0x1957   /usr/obj/usr/src/sys/GENERIC
> /vga_pci.o
> 
> (From an 11.0-stable build)
> 
> device ppc and friends is a lot more for example:
> 
>   text   data   bss    dec      hex   filename
>   6238      0     0   6238   0x185e   /usr/obj/usr/src/sys/GENERIC/ppb_1284.o
>   1675     28     0   1703    0x6a7   /usr/obj/usr/src/sys/GENERIC/ppb_base.o
>   2042      0     0   2042    0x7fa   /usr/obj/usr/src/sys/GENERIC/ppb_msq.o
>   6025    296     8   6329   0x18b9   /usr/obj/usr/src/sys/GENERIC/ppbconf.o
>      0    168     0    168     0xa8   /usr/obj/usr/src/sys/GENERIC/ppbus_if.o
>   9099     36     0   9135   0x23af   /usr/obj/usr/src/sys/GENERIC/ppc.o
>    495    256     0    751    0x2ef   /usr/obj/usr/src/sys/GENERIC/ppc_acpi.o
>   1671    256     0   1927    0x787   /usr/obj/usr/src/sys/GENERIC/ppc_isa.o
>   1124    208     0   1332    0x534   /usr/obj/usr/src/sys/GENERIC/ppc_pci.o
>    451    208     0    659    0x293   /usr/obj/usr/src/sys/GENERIC/ppc_puc.o
>   2751    428     8   3187    0xc73   /usr/obj/usr/src/sys/GENERIC/ppi.o
> 
> It is needed for drm.
> 

Ok, so ... make it dependant on drm, vt, sc and pci?

sean

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