[SCSI] don't build scsi_dma_{map,unmap} for !HAS_DMA
With
dma-mapping-prevent-dma-dependent-code-from-linking-on.patch
scsi fails to build on !HAS_DMA architectures:
drivers/built-in.o(.text+0x20af6): In function `scsi_dma_map':
: undefined reference to `dma_map_sg'
drivers/built-in.o(.text+0x20b5c): In function `scsi_dma_unmap':
: undefined reference to `dma_unmap_sg'
I split those functions out into a new file. Builds on s390 and i386.
Move scsi_dma_{map,unmap} into scsi_lib_dma.c which is only build if
HAS_DMA is set.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: James Bottomley <James.Bottomley@SteelEye.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index cbc2e2b..0f86895 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -148,9 +148,9 @@
obj-$(CONFIG_SCSI_WAIT_SCAN) += scsi_wait_scan.o
scsi_mod-y += scsi.o hosts.o scsi_ioctl.o constants.o \
- scsicam.o scsi_error.o scsi_lib.o \
- scsi_scan.o scsi_sysfs.o \
- scsi_devinfo.o
+ scsicam.o scsi_error.o scsi_lib.o
+scsi_mod-$(CONFIG_SCSI_DMA) += scsi_lib_dma.o
+scsi_mod-y += scsi_scan.o scsi_sysfs.o scsi_devinfo.o
scsi_mod-$(CONFIG_SCSI_NETLINK) += scsi_netlink.o
scsi_mod-$(CONFIG_SYSCTL) += scsi_sysctl.o
scsi_mod-$(CONFIG_SCSI_PROC_FS) += scsi_proc.o