linux/kernel/module.c, branch v2.6.28

Merge branch 'proc' of git://git.kernel.org/pub/scm/linux/kernel/git/adobriyan/proc

2008-10-23T19:04:37Z

* 'proc' of git://git.kernel.org/pub/scm/linux/kernel/git/adobriyan/proc: (35 commits) proc: remove fs/proc/proc_misc.c proc: move /proc/vmcore creation to fs/proc/vmcore.c proc: move pagecount stuff to fs/proc/page.c proc: move all /proc/kcore stuff to fs/proc/kcore.c proc: move /proc/schedstat boilerplate to kernel/sched_stats.h proc: move /proc/modules boilerplate to kernel/module.c proc: move /proc/diskstats boilerplate to block/genhd.c proc: move /proc/zoneinfo boilerplate to mm/vmstat.c proc: move /proc/vmstat boilerplate to mm/vmstat.c proc: move /proc/pagetypeinfo boilerplate to mm/vmstat.c proc: move /proc/buddyinfo boilerplate to mm/vmstat.c proc: move /proc/vmallocinfo to mm/vmalloc.c proc: move /proc/slabinfo boilerplate to mm/slub.c, mm/slab.c proc: move /proc/slab_allocators boilerplate to mm/slab.c proc: move /proc/interrupts boilerplate code to fs/proc/interrupts.c proc: move /proc/stat to fs/proc/stat.c proc: move rest of /proc/partitions code to block/genhd.c proc: move /proc/cpuinfo code to fs/proc/cpuinfo.c proc: move /proc/devices code to fs/proc/devices.c proc: move rest of /proc/locks to fs/locks.c ...

proc: move /proc/modules boilerplate to kernel/module.c

2008-10-23T14:03:13Z

Signed-off-by: Alexey Dobriyan

Remove stop_machine during module load v2

2008-10-21T23:00:22Z

Remove stop_machine during module load v2 module loading currently does a stop_machine on each module load to insert the module into the global module lists. Especially on larger systems this can be quite expensive. It does that to handle concurrent lock lessmodule list readers like kallsyms. I don't think stop_machine() is actually needed to insert something into a list though. There are no concurrent writers because the module mutex is taken. And the RCU list functions know how to insert a node into a list with the right memory ordering so that concurrent readers don't go off into the wood. So remove the stop_machine for the module list insert and just do a list_add_rcu() instead. Module removal will still do a stop_machine of course, it needs that for other reasons. v2: Revised readers based on Paul's comments. All readers that only rely on disabled preemption need to be changed to list_for_each_rcu(). Done that. The others are ok because they have the modules mutex. Also added a possible missing preempt disable for print_modules(). [cc Paul McKenney for review. It's not RCU, but quite similar.] Acked-by: Paul E. McKenney Signed-off-by: Rusty Russell

module: simplify load_module.

2008-10-21T23:00:15Z

Linus' recent catch of stack overflow in load_module lead me to look at the code. A couple of helpers to get a section address and get objects from a section can help clean things up a little. (And in case you're wondering, the stack size also dropped from 328 to 284 bytes). Signed-off-by: Rusty Russell

Merge branch 'tracing-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2008-10-20T20:35:07Z

* 'tracing-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (131 commits) tracing/fastboot: improve help text tracing/stacktrace: improve help text tracing/fastboot: fix initcalls disposition in bootgraph.pl tracing/fastboot: fix bootgraph.pl initcall name regexp tracing/fastboot: fix issues and improve output of bootgraph.pl tracepoints: synchronize unregister static inline tracepoints: tracepoint_synchronize_unregister() ftrace: make ftrace_test_p6nop disassembler-friendly markers: fix synchronize marker unregister static inline tracing/fastboot: add better resolution to initcall debug/tracing trace: add build-time check to avoid overrunning hex buffer ftrace: fix hex output mode of ftrace tracing/fastboot: fix initcalls disposition in bootgraph.pl tracing/fastboot: fix printk format typo in boot tracer ftrace: return an error when setting a nonexistent tracer ftrace: make some tracers reentrant ring-buffer: make reentrant ring-buffer: move page indexes into page headers tracing/fastboot: only trace non-module initcalls ftrace: move pc counter in irqtrace ... Manually fix conflicts: - init/main.c: initcall tracing - kernel/module.c: verbose level vs tracepoints - scripts/bootgraph.pl: fallout from cherry-picking commits.

Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6

2008-10-17T16:50:12Z

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6: (25 commits) staging: at76_usb wireless driver Staging: workaround build system bug Staging: Lindent sxg.c Staging: SLICOSS: Call pci_release_regions at driver exit Staging: SLICOSS: Fix remaining type names Staging: SLICOSS: Fix warnings due to static usage Staging: SLICOSS: lots of checkpatch fixes Staging: go7007 v4l fixes Staging: Fix gcc warnings in sxg Staging: add echo cancelation module Staging: add wlan-ng prism2 usb driver Staging: add w35und wifi driver Staging: USB/IP: add host driver Staging: USB/IP: add client driver Staging: USB/IP: add common functions needed Staging: add the go7007 video driver Staging: add me4000 pci data collection driver Staging: add me4000 firmware files Staging: add sxg network driver Staging: add Alacritech slicoss network driver ... Fixed up conflicts due to taint flags changes and MAINTAINERS cleanup in MAINTAINERS, include/linux/kernel.h and kernel/panic.c.

Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6

2008-10-16T19:40:26Z

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (46 commits) UIO: Fix mapping of logical and virtual memory UIO: add automata sercos3 pci card support UIO: Change driver name of uio_pdrv UIO: Add alignment warnings for uio-mem Driver core: add bus_sort_breadthfirst() function NET: convert the phy_device file to use bus_find_device_by_name kobject: Cleanup kobject_rename and !CONFIG_SYSFS kobject: Fix kobject_rename and !CONFIG_SYSFS sysfs: Make dir and name args to sysfs_notify() const platform: add new device registration helper sysfs: use ilookup5() instead of ilookup5_nowait() PNP: create device attributes via default device attributes Driver core: make bus_find_device_by_name() more robust usb: turn dev_warn+WARN_ON combos into dev_WARN debug: use dev_WARN() rather than WARN_ON() in device_pm_add() debug: Introduce a dev_WARN() function sysfs: fix deadlock device model: Do a quickcheck for driver binding before doing an expensive check Driver core: Fix cleanup in device_create_vargs(). Driver core: Clarify device cleanup. ...

Make the taint flags reliable

2008-10-16T18:21:31Z

It's somewhat unlikely that it happens, but right now a race window between interrupts or machine checks or oopses could corrupt the tainted bitmap because it is modified in a non atomic fashion. Convert the taint variable to an unsigned long and use only atomic bit operations on it. Unfortunately this means the intvec sysctl functions cannot be used on it anymore. It turned out the taint sysctl handler could actually be simplified a bit (since it only increases capabilities) so this patch actually removes code. [akpm@linux-foundation.org: remove unneeded include] Signed-off-by: Andi Kleen Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

driver core: basic infrastructure for per-module dynamic debug messages

2008-10-16T16:24:47Z

Base infrastructure to enable per-module debug messages. I've introduced CONFIG_DYNAMIC_PRINTK_DEBUG, which when enabled centralizes control of debugging statements on a per-module basis in one /proc file, currently, /dynamic_printk/modules. When, CONFIG_DYNAMIC_PRINTK_DEBUG, is not set, debugging statements can still be enabled as before, often by defining 'DEBUG' for the proper compilation unit. Thus, this patch set has no affect when CONFIG_DYNAMIC_PRINTK_DEBUG is not set. The infrastructure currently ties into all pr_debug() and dev_dbg() calls. That is, if CONFIG_DYNAMIC_PRINTK_DEBUG is set, all pr_debug() and dev_dbg() calls can be dynamically enabled/disabled on a per-module basis. Future plans include extending this functionality to subsystems, that define their own debug levels and flags. Usage: Dynamic debugging is controlled by the debugfs file, /dynamic_printk/modules. This file contains a list of the modules that can be enabled. The format of the file is as follows: . . . : Name of the module in which the debug call resides : whether the messages are enabled or not For example: snd_hda_intel enabled=0 fixup enabled=1 driver enabled=0 Enable a module: $echo "set enabled=1 " > dynamic_printk/modules Disable a module: $echo "set enabled=0 " > dynamic_printk/modules Enable all modules: $echo "set enabled=1 all" > dynamic_printk/modules Disable all modules: $echo "set enabled=0 all" > dynamic_printk/modules Finally, passing "dynamic_printk" at the command line enables debugging for all modules. This mode can be turned off via the above disable command. [gkh: minor cleanups and tweaks to make the build work quietly] Signed-off-by: Jason Baron Signed-off-by: Greg Kroah-Hartman

modules: fix module "notes" kobject leak

2008-10-16T16:24:41Z

Fix "notes" kobject leak It happens every rmmod if KALLSYMS=y and SYSFS=y. # modprobe foo kobject: 'foo' (ffffffffa00743d0): kobject_add_internal: parent: 'module', set: 'module' kobject: 'holders' (ffff88017e7c5770): kobject_add_internal: parent: 'foo', set: '' kobject: 'foo' (ffffffffa00743d0): kobject_uevent_env kobject: 'foo' (ffffffffa00743d0): fill_kobj_path: path = '/module/foo' kobject: 'notes' (ffff88017fa9b668): kobject_add_internal: parent: 'foo', set: '' ^^^^^ # rmmod foo kobject: 'holders' (ffff88017e7c5770): kobject_cleanup kobject: 'holders' (ffff88017e7c5770): auto cleanup kobject_del kobject: 'holders' (ffff88017e7c5770): calling ktype release kobject: (ffff88017e7c5770): dynamic_kobj_release kobject: 'holders': free name kobject: 'foo' (ffffffffa00743d0): kobject_cleanup kobject: 'foo' (ffffffffa00743d0): does not have a release() function, it is broken and must be fixed. kobject: 'foo' (ffffffffa00743d0): auto cleanup 'remove' event kobject: 'foo' (ffffffffa00743d0): kobject_uevent_env kobject: 'foo' (ffffffffa00743d0): fill_kobj_path: path = '/module/foo' kobject: 'foo' (ffffffffa00743d0): auto cleanup kobject_del kobject: 'foo': free name [whooops] Signed-off-by: Alexey Dobriyan Cc: stable Signed-off-by: Greg Kroah-Hartman