Kay Sievers
578454ff7e
driver core: add devname module aliases to allow module on-demand auto-loading ...
This adds:
alias: devname:<name>
to some common kernel modules, which will allow the on-demand loading
of the kernel module when the device node is accessed.
Ideally all these modules would be compiled-in, but distros seems too
much in love with their modularization that we need to cover the common
cases with this new facility. It will allow us to remove a bunch of pretty
useless init scripts and modprobes from init scripts.
The static device node aliases will be carried in the module itself. The
program depmod will extract this information to a file in the module directory:
$ cat /lib/modules/2.6.34-00650-g537b60d-dirty/modules.devname
# Device nodes to trigger on-demand module loading.
microcode cpu/microcode c10:184
fuse fuse c10:229
ppp_generic ppp c108:0
tun net/tun c10:200
dm_mod mapper/control c10:235
Udev will pick up the depmod created file on startup and create all the
static device nodes which the kernel modules specify, so that these modules
get automatically loaded when the device node is accessed:
$ /sbin/udevd --debug
...
static_dev_create_from_modules: mknod '/dev/cpu/microcode' c10:184
static_dev_create_from_modules: mknod '/dev/fuse' c10:229
static_dev_create_from_modules: mknod '/dev/ppp' c108:0
static_dev_create_from_modules: mknod '/dev/net/tun' c10:200
static_dev_create_from_modules: mknod '/dev/mapper/control' c10:235
udev_rules_apply_static_dev_perms: chmod '/dev/net/tun' 0666
udev_rules_apply_static_dev_perms: chmod '/dev/fuse' 0666
A few device nodes are switched to statically allocated numbers, to allow
the static nodes to work. This might also useful for systems which still run
a plain static /dev, which is completely unsafe to use with any dynamic minor
numbers.
Note:
The devname aliases must be limited to the *common* and *single*instance*
device nodes, like the misc devices, and never be used for conceptually limited
systems like the loop devices, which should rather get fixed properly and get a
control node for losetup to talk to, instead of creating a random number of
device nodes in advance, regardless if they are ever used.
This facility is to hide the mess distros are creating with too modualized
kernels, and just to hide that these modules are not compiled-in, and not to
paper-over broken concepts. Thanks! :)
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Alasdair G Kergon <agk@redhat.com>
Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
Cc: Ian Kent <raven@themaw.net>
Signed-Off-By: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-25 15:08:26 -07:00
mm: compaction: add /sys trigger for per-node memory compaction
2010-05-25 08:06:59 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2010-05-20 09:20:59 -07:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
Documentation: fix block/biodoc.txt dma mapping description
2010-03-08 09:11:07 +01:00
Merge branch 'master' into for-2.6.35
2010-05-21 21:27:26 +02:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
doc: fix console doc typo
2010-02-24 13:51:32 +01:00
Documentation/development-process: add staging & mmotm info
2010-05-24 07:30:55 -07:00
dm: document when snapshot has finished merging
2010-03-06 02:29:56 +00:00
docbook: make mtd nand module init static
2010-05-24 07:30:55 -07:00
Fix spelling of 'platform' in comments and doc
2010-02-05 12:22:34 +01:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
lkdtm: add debugfs access and loosen KPROBE ties
2010-03-06 11:26:32 -08:00
fbdev: rename imacfb.txt to efifb.txt and change imacfb to efifb.
2010-04-07 08:38:02 -07:00
Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
2010-05-25 08:17:01 -07:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
i2c-i801: Let the user disable selected driver features
2010-05-21 18:40:54 +02:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2010-05-20 09:20:59 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
2010-03-19 09:43:06 -07:00
gigaset: small documentation improvement
2010-02-26 01:24:22 -08:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
KVM: MMU: Segregate shadow pages with different cr0.wp
2010-05-19 11:41:09 +03:00
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86
2010-05-21 17:13:24 -07:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
2010-05-20 21:04:44 -07:00
Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
2010-05-21 18:58:52 -07:00
pcmcia: dev_node removal (core)
2010-05-10 10:23:17 +02:00
Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
2010-05-21 18:58:52 -07:00
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
2010-05-21 11:17:05 -07:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2010-05-18 08:27:54 -07:00
Merge branch 'for-next' into for-linus
2010-03-08 16:55:37 +01:00
sched: Remove USER_SCHED from documentation
2010-04-02 20:12:01 +02:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
ldisc: new dcd_change() method for line disciplines
2010-03-12 15:52:43 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
2010-05-20 09:41:44 -07:00
spi/ep93xx: implemented driver for Cirrus EP93xx SPI controller
2010-05-25 00:23:16 -06:00
mm: compaction: add a tunable that decides when memory should be compacted and when it should be reclaimed
2010-05-25 08:06:59 -07:00
Documentation/timers/hpet_example: drop duplicate header files
2010-05-24 07:30:56 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2010-05-20 09:20:59 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
2010-05-20 21:26:12 -07:00
V4L/DVB: saa7134: Add support new Behold TV cards
2010-05-19 12:58:41 -03:00
Documentation/vm: use better value for MAP_HUGETLB
2010-05-24 07:30:56 -07:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
watchdog: update/improve/consolidate watchdog driver
2010-05-25 09:05:34 +00:00
x86, numa: Remove configurable node size support for numa emulation
2010-02-15 14:34:18 -08:00
Add a document describing the padata interface
2010-05-14 09:18:55 -06:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
netfilter: xtables: remove xt_string revision 0
2010-03-25 17:04:57 +01:00
Document Linux's circular buffering capabilities
2010-03-24 16:31:22 -07:00
CRED: Holding a spinlock does not imply the holding of RCU read lock
2010-04-27 08:49:03 +10:00
driver core: add devname module aliases to allow module on-demand auto-loading
2010-05-25 15:08:26 -07:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
Documentation: rename PCI-DMA-mapping.txt to DMA-API-HOWTO.txt
2010-03-12 15:52:43 -08:00
Merge branch 'for-linus-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-kconfig
2010-02-25 14:43:57 -08:00
doc: fix Defaultd -> Defaults typo in EISA doc
2010-02-05 12:22:39 +01:00
Documentation/email-clients.txt: update gmail information
2010-03-12 15:52:35 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
2010-05-20 21:04:44 -07:00
gpio: introduce gpio_request_one() and friends
2010-03-06 11:26:48 -08:00
Documentation/HOWTO: update git home URL
2010-04-22 15:24:56 -07:00
init/main.c: improve usability in case of init binary failure
2010-03-06 11:26:29 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2010-05-20 09:20:59 -07:00
ipmi: add parameter to limit CPU usage in kipmid
2010-03-12 15:52:39 -08:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
watchdog: update/improve/consolidate watchdog driver
2010-05-25 09:05:34 +00:00
kobject: documentation: Update to refer to kset-example.c.
2010-03-19 07:12:20 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2010-05-20 09:20:59 -07:00
Documentation/fs/: split txt and source files
2010-03-12 15:52:35 -08:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
Document Linux's circular buffering capabilities
2010-03-24 16:31:22 -07:00
panic: Add taint flag TAINT_FIRMWARE_WORKAROUND ('I')
2010-05-19 08:37:43 +01:00
Add a document describing the padata interface
2010-05-14 09:18:55 -06:00
doc: capitalization and other minor fixes in pnp doc
2010-02-05 12:22:44 +01:00
rbtree: Add support for augmented rbtrees
2010-02-18 15:40:56 -08:00
Document the rfkill sysfs ABI
2010-03-10 17:09:33 -05:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
doc: Change urls for sparse
2010-04-27 22:59:07 +02:00
Documentation: -stable rules: upstream commit ID requirement reworded
2010-04-22 15:24:56 -07:00
Documentation: update SubmitChecklist for O=objdir and kconfig testing
2010-05-24 07:31:20 -07:00
Fix typos in comments
2010-03-16 11:47:56 +01:00
Input: Documentation/sysrq.txt - update KEY_SYSRQ info
2010-05-19 10:14:15 -07:00
Documentation/volatile-considered-harmful.txt: correct cpu_relax() documentation
2010-03-24 16:31:20 -07:00
578454ff7e
