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staging: comedi: split out PCI support into new module 

Setting the `CONFIG_COMEDI_PCI_DRIVERS` kernel configuration option
makes the main "comedi" module depend on the PCI support in the kernel.
That's not that big a deal since PCI support in the kernel is either
built into the kernel or is absent, and is not in a separate module.
Still, not all low-level Comedi drivers need PCI support, so we could
save a bit of space by not including it.  The Comedi PCI support
functions are all in "comedi_pci.c".  Turn it into a separate module so
the support code doesn't have to be loaded unnecessarily.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott 2014-10-31 17:47:39 +00:00 committed by Greg Kroah-Hartman
parent ba9ac25e96
commit bc3fe15655
3 changed files with 21 additions and 2 deletions
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5
drivers/staging/comedi/Kconfig
View File

@ -564,11 +564,14 @@ config COMEDI_S526
endif # COMEDI_ISA_DRIVERS
menuconfig COMEDI_PCI_DRIVERS
bool "Comedi PCI drivers"
tristate "Comedi PCI drivers"
depends on PCI
---help---
Enable support for comedi PCI drivers.
To compile this support as a module, choose M here: the module will
be called comedi_pci.
if COMEDI_PCI_DRIVERS
config COMEDI_8255_PCI

2
drivers/staging/comedi/Makefile
View File

@ -2,10 +2,10 @@ ccflags-$(CONFIG_COMEDI_DEBUG) := -DDEBUG
comedi-y := comedi_fops.o range.o drivers.o \
comedi_buf.o
comedi-$(CONFIG_COMEDI_PCI_DRIVERS) += comedi_pci.o
comedi-$(CONFIG_PROC_FS) += proc.o
comedi-$(CONFIG_COMPAT) += comedi_compat32.o
obj-$(CONFIG_COMEDI_PCI_DRIVERS) += comedi_pci.o
obj-$(CONFIG_COMEDI_PCMCIA_DRIVERS) += comedi_pcmcia.o
obj-$(CONFIG_COMEDI_USB_DRIVERS) += comedi_usb.o

16
drivers/staging/comedi/comedi_pci.c
View File

@ -16,6 +16,7 @@
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
@ -168,3 +169,18 @@ void comedi_pci_driver_unregister(struct comedi_driver *comedi_driver,
comedi_driver_unregister(comedi_driver);
}
EXPORT_SYMBOL_GPL(comedi_pci_driver_unregister);
static int __init comedi_pci_init(void)
{
return 0;
}
module_init(comedi_pci_init);
static void __exit comedi_pci_exit(void)
{
}
module_exit(comedi_pci_exit);
MODULE_AUTHOR("http://www.comedi.org");
MODULE_DESCRIPTION("Comedi PCI interface module");
MODULE_LICENSE("GPL");