FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-25 10:59:05 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
8c2676a587
linux/drivers/ide
History
David Howells 9361401eb7 [PATCH] BLOCK: Make it possible to disable the block layer [try #6] 
Make it possible to disable the block layer.  Not all embedded devices require
it, some can make do with just JFFS2, NFS, ramfs, etc - none of which require
the block layer to be present.

This patch does the following:

 (*) Introduces CONFIG_BLOCK to disable the block layer, buffering and blockdev
     support.

 (*) Adds dependencies on CONFIG_BLOCK to any configuration item that controls
     an item that uses the block layer.  This includes:

     (*) Block I/O tracing.

     (*) Disk partition code.

     (*) All filesystems that are block based, eg: Ext3, ReiserFS, ISOFS.

     (*) The SCSI layer.  As far as I can tell, even SCSI chardevs use the
     	 block layer to do scheduling.  Some drivers that use SCSI facilities -
     	 such as USB storage - end up disabled indirectly from this.

     (*) Various block-based device drivers, such as IDE and the old CDROM
     	 drivers.

     (*) MTD blockdev handling and FTL.

     (*) JFFS - which uses set_bdev_super(), something it could avoid doing by
     	 taking a leaf out of JFFS2's book.

 (*) Makes most of the contents of linux/blkdev.h, linux/buffer_head.h and
     linux/elevator.h contingent on CONFIG_BLOCK being set.  sector_div() is,
     however, still used in places, and so is still available.

 (*) Also made contingent are the contents of linux/mpage.h, linux/genhd.h and
     parts of linux/fs.h.

 (*) Makes a number of files in fs/ contingent on CONFIG_BLOCK.

 (*) Makes mm/bounce.c (bounce buffering) contingent on CONFIG_BLOCK.

 (*) set_page_dirty() doesn't call __set_page_dirty_buffers() if CONFIG_BLOCK
     is not enabled.

 (*) fs/no-block.c is created to hold out-of-line stubs and things that are
     required when CONFIG_BLOCK is not set:

     (*) Default blockdev file operations (to give error ENODEV on opening).

 (*) Makes some /proc changes:

     (*) /proc/devices does not list any blockdevs.

     (*) /proc/diskstats and /proc/partitions are contingent on CONFIG_BLOCK.

 (*) Makes some compat ioctl handling contingent on CONFIG_BLOCK.

 (*) If CONFIG_BLOCK is not defined, makes sys_quotactl() return -ENODEV if
     given command other than Q_SYNC or if a special device is specified.

 (*) In init/do_mounts.c, no reference is made to the blockdev routines if
     CONFIG_BLOCK is not defined.  This does not prohibit NFS roots or JFFS2.

 (*) The bdflush, ioprio_set and ioprio_get syscalls can now be absent (return
     error ENOSYS by way of cond_syscall if so).

 (*) The seclvl_bd_claim() and seclvl_bd_release() security calls do nothing if
     CONFIG_BLOCK is not set, since they can't then happen.

Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2006-09-30 20:52:31 +02:00
..
arm Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
cris Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
h8300 Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
legacy [PATCH] Split struct request ->flags into two parts 2006-09-30 20:23:37 +02:00
mips [PATCH] Alchemy: Delete unused pt_regs * argument from au1xxx_dbdma_chan_alloc 2006-09-26 08:48:54 -07:00
pci [PATCH] atiixp: ATI SB600 IDE support for various modes 2006-09-29 09:18:12 -07:00
ppc fix broken/dubious driver suspend() methods 2006-09-25 21:08:37 -07:00
ide-cd.c [PATCH] Split struct request ->flags into two parts 2006-09-30 20:23:37 +02:00
ide-cd.h [PATCH] ide-cd: remove write-only cmd field from struct cdrom_info 2005-12-15 02:20:49 +01:00
ide-disk.c [PATCH] Split struct request ->flags into two parts 2006-09-30 20:23:37 +02:00
ide-dma.c [PATCH] Split struct request ->flags into two parts 2006-09-30 20:23:37 +02:00
ide-floppy.c [PATCH] Remove ->rq_status from struct request 2006-09-30 20:29:23 +02:00
ide-generic.c
ide-io.c [PATCH] Remove ->rq_status from struct request 2006-09-30 20:29:23 +02:00
ide-iops.c [PATCH] IDE: Touch NMI watchdog during resume from STR 2006-07-31 13:28:39 -07:00
ide-lib.c [PATCH] Split struct request ->flags into two parts 2006-09-30 20:23:37 +02:00
ide-pnp.c
ide-probe.c [PATCH] irq-flags: ide: Use the new IRQF_ constants 2006-07-02 13:58:49 -07:00
ide-proc.c [PATCH] optical /proc/ide/*/media 2006-09-08 10:22:50 -07:00
ide-tape.c [PATCH] Remove ->rq_status from struct request 2006-09-30 20:29:23 +02:00
ide-taskfile.c [PATCH] Split struct request ->flags into two parts 2006-09-30 20:23:37 +02:00
ide-timing.h [PATCH] ide: actually honor drive's minimum PIO/DMA cycle times 2006-06-26 09:58:27 -07:00
ide.c [PATCH] Remove ->waiting member from struct request 2006-09-30 20:29:12 +02:00
Kconfig [PATCH] BLOCK: Make it possible to disable the block layer [try #6] 2006-09-30 20:52:31 +02:00
Makefile [IDE] Add driver for Sibyte Swarm evaluation board 2005-11-17 16:23:50 +00:00
setup-pci.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00