block: make scsi_request and scsi ioctl support optional
We only need this code to support scsi, ide, cciss and virtio. And at least for virtio it's a deprecated feature to start with. This should shrink the kernel size for embedded device that only use, say eMMC a bit. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
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@ -49,9 +49,13 @@ config LBDAF
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If unsure, say Y.
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config BLK_SCSI_REQUEST
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bool
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config BLK_DEV_BSG
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bool "Block layer SG support v4"
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default y
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select BLK_SCSI_REQUEST
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help
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Saying Y here will enable generic SG (SCSI generic) v4 support
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for any block device.
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@ -71,6 +75,7 @@ config BLK_DEV_BSGLIB
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bool "Block layer SG support v4 helper lib"
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default n
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select BLK_DEV_BSG
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select BLK_SCSI_REQUEST
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help
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Subsystems will normally enable this if needed. Users will not
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normally need to manually enable this.
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@ -7,10 +7,11 @@ obj-$(CONFIG_BLOCK) := bio.o elevator.o blk-core.o blk-tag.o blk-sysfs.o \
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blk-exec.o blk-merge.o blk-softirq.o blk-timeout.o \
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blk-lib.o blk-mq.o blk-mq-tag.o blk-stat.o \
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blk-mq-sysfs.o blk-mq-cpumap.o blk-mq-sched.o ioctl.o \
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genhd.o scsi_ioctl.o partition-generic.o ioprio.o \
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genhd.o partition-generic.o ioprio.o \
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badblocks.o partitions/
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obj-$(CONFIG_BOUNCE) += bounce.o
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obj-$(CONFIG_BOUNCE) += bounce.o
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obj-$(CONFIG_BLK_SCSI_REQUEST) += scsi_ioctl.o
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obj-$(CONFIG_BLK_DEV_BSG) += bsg.o
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obj-$(CONFIG_BLK_DEV_BSGLIB) += bsg-lib.o
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obj-$(CONFIG_BLK_CGROUP) += blk-cgroup.o
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@ -69,6 +69,7 @@ config AMIGA_Z2RAM
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config GDROM
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tristate "SEGA Dreamcast GD-ROM drive"
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depends on SH_DREAMCAST
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select BLK_SCSI_REQUEST # only for the generic cdrom code
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help
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A standard SEGA Dreamcast comes with a modified CD ROM drive called a
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"GD-ROM" by SEGA to signify it is capable of reading special disks
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@ -114,6 +115,7 @@ config BLK_CPQ_CISS_DA
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tristate "Compaq Smart Array 5xxx support"
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depends on PCI
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select CHECK_SIGNATURE
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select BLK_SCSI_REQUEST
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help
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This is the driver for Compaq Smart Array 5xxx controllers.
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Everyone using these boards should say Y here.
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@ -386,6 +388,7 @@ config BLK_DEV_RAM_DAX
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config CDROM_PKTCDVD
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tristate "Packet writing on CD/DVD media (DEPRECATED)"
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depends on !UML
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select BLK_SCSI_REQUEST
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help
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Note: This driver is deprecated and will be removed from the
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kernel in the near future!
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@ -497,6 +500,7 @@ config XEN_BLKDEV_BACKEND
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config VIRTIO_BLK
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tristate "Virtio block driver"
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depends on VIRTIO
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select BLK_SCSI_REQUEST
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---help---
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This is the virtual block driver for virtio. It can be used with
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lguest or QEMU based VMMs (like KVM or Xen). Say Y or M.
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@ -25,6 +25,7 @@ config PARIDE_PD
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config PARIDE_PCD
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tristate "Parallel port ATAPI CD-ROMs"
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depends on PARIDE
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select BLK_SCSI_REQUEST # only for the generic cdrom code
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---help---
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This option enables the high-level driver for ATAPI CD-ROM devices
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connected through a parallel port. If you chose to build PARIDE
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@ -10,6 +10,7 @@ menuconfig IDE
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tristate "ATA/ATAPI/MFM/RLL support (DEPRECATED)"
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depends on HAVE_IDE
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depends on BLOCK
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select BLK_SCSI_REQUEST
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---help---
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If you say Y here, your kernel will be able to manage ATA/(E)IDE and
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ATAPI units. The most common cases are IDE hard drives and ATAPI
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@ -18,6 +18,7 @@ config SCSI
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depends on BLOCK
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select SCSI_DMA if HAS_DMA
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select SG_POOL
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select BLK_SCSI_REQUEST
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---help---
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If you want to use a SCSI hard disk, SCSI tape drive, SCSI CD-ROM or
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any other SCSI device under Linux, say Y and make sure that you know
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@ -4,6 +4,7 @@ menuconfig TARGET_CORE
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depends on SCSI && BLOCK
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select CONFIGFS_FS
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select CRC_T10DIF
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select BLK_SCSI_REQUEST # only for scsi_command_size_tbl..
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default n
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help
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Say Y or M here to enable the TCM Storage Engine and ConfigFS enabled
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@ -104,6 +104,7 @@ config NFSD_SCSILAYOUT
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depends on NFSD_V4 && BLOCK
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select NFSD_PNFS
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select EXPORTFS_BLOCK_OPS
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select BLK_SCSI_REQUEST
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help
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This option enables support for the exporting pNFS SCSI layouts
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in the kernel's NFS server. The pNFS SCSI layout enables NFS
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