Neil Brown bd5349cfd2 [PATCH] Convert cpu hotplug notifiers to use raw_notifier instead of blocking_notifier ...

The use of blocking notifier by _cpu_up and _cpu_down in cpu.c has two
problem.

1/ An interaction with the workqueue notifier causes lockdep to spit a
   warning.

2/ A notifier could conceivable be added or removed while _cpu_up or
   _cpu_down are in process.  As each notifier is called twice (prepare
   then commit/abort) this could be unhealthy.

To fix to we simply take cpu_add_remove_lock while adding or removing
notifiers to/from the list.

This makes the 'blocking' usage unnecessary as all accesses to cpu_chain
are now protected by cpu_add_remove_lock.  So change "blocking" to "raw" in
all relevant places.  This fixes 1.

Credit: Andrew Morton
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com> (reporter)
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2006-10-17 08:18:48 -07:00

..

irq

[PATCH] genirq: clean up irq-flow-type naming

2006-10-17 08:18:45 -07:00

power

[PATCH] swsusp: fix memory leaks

2006-10-17 08:18:44 -07:00

time

[PATCH] i386 Time: Avoid PIT SMP lockups

2006-10-17 08:18:42 -07:00

.gitignore

gitignore: ignore more generated files

2006-01-03 11:35:26 +01:00

acct.c

[PATCH] csa: convert CONFIG tag for extended accounting routines

2006-10-01 00:39:29 -07:00

audit.c

[PATCH] kauditd_thread warning fix

2006-10-06 08:53:39 -07:00

audit.h

[PATCH] audit: AUDIT_PERM support

2006-09-11 13:32:30 -04:00

auditfilter.c

[PATCH] arch filter lists with < or > should not be accepted

2006-10-04 08:31:16 -04:00

auditsc.c

[PATCH] name_count array overrun

2006-10-04 08:31:21 -04:00

capability.c

[PATCH] pidspace: is_init()

2006-09-29 09:18:12 -07:00

compat.c

[PATCH] BLOCK: Revert patch to hack around undeclared sigset_t in linux/compat.h

2006-10-02 08:03:31 -07:00

configs.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

cpu.c

[PATCH] Convert cpu hotplug notifiers to use raw_notifier instead of blocking_notifier

2006-10-17 08:18:48 -07:00

cpuset.c

[PATCH] cpuset ANSI prototype

2006-10-10 15:37:23 -07:00

delayacct.c

[PATCH] task delay accounting fixes

2006-09-01 11:39:08 -07:00

dma.c

[PATCH] kernel-doc for kernel/dma.c

2006-10-03 08:03:41 -07:00

exec_domain.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

exit.c

[PATCH] namespaces: exit_task_namespaces() invalidates nsproxy

2006-10-02 07:57:21 -07:00

extable.c

[PATCH] symbol_put_addr() locks kernel

2006-05-15 11:20:55 -07:00

fork.c

[PATCH] rt-mutex: fixup rt-mutex debug code

2006-10-17 08:18:48 -07:00

futex_compat.c

[PATCH] __user annotations: futex

2006-10-10 15:37:22 -07:00

futex.c

[PATCH] __user annotations: futex

2006-10-10 15:37:22 -07:00

hrtimer.c

[PATCH] posix-timers: Fix clock_nanosleep() doesn't return the remaining time in compatibility mode

2006-09-29 09:18:15 -07:00

itimer.c

[PATCH] hrtimers: remove data field

2006-03-26 08:57:03 -08:00

kallsyms.c

[PATCH] Create kallsyms_lookup_size_offset()

2006-10-03 08:03:41 -07:00

Kconfig.hz

…

Kconfig.preempt

…

kexec.c

[PATCH] kexec warning fix

2006-09-29 09:18:15 -07:00

kfifo.c

[PATCH] memory ordering in __kfifo primitives

2006-09-29 09:18:13 -07:00

kmod.c

[PATCH] introduce kernel_execve

2006-10-02 07:57:23 -07:00

kprobes.c

[PATCH] kretprobe spinlock deadlock patch

2006-10-02 07:57:16 -07:00

ksysfs.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

kthread.c

[PATCH] remove kernel/kthread.c:kthread_stop_sem()

2006-07-14 21:53:52 -07:00

latency.c

[PATCH] maximum latency tracking infrastructure

2006-10-01 00:39:19 -07:00

lockdep_internals.h

[PATCH] lockdep: double the number of stack-trace entries

2006-09-13 07:32:14 -07:00

lockdep_proc.c

[PATCH] lockdep: procfs

2006-07-03 15:27:04 -07:00

lockdep.c

[PATCH] lockdep: increase max allowed recursion depth

2006-10-17 08:18:42 -07:00

Makefile

[PATCH] srcu-3: RCU variant permitting read-side blocking

2006-10-04 07:55:30 -07:00

module.c

[PATCH] fix Module taint flags listing in Oops/panic

2006-10-11 11:14:21 -07:00

mutex-debug.c

[PATCH] lockdep: prove mutex locking correctness

2006-07-03 15:27:04 -07:00

mutex-debug.h

[PATCH] lockdep: better lock debugging

2006-07-03 15:27:01 -07:00

mutex.c

[PATCH] lockdep: prove mutex locking correctness

2006-07-03 15:27:04 -07:00

mutex.h

[PATCH] lockdep: prove mutex locking correctness

2006-07-03 15:27:04 -07:00

nsproxy.c

[PATCH] nsproxy cloning error path fix

2006-10-02 07:57:22 -07:00

panic.c

[PATCH] x86: Clean up x86 NMI sysctls

2006-09-30 01:47:55 +02:00

params.c

[PATCH] module_subsys: initialize earlier

2006-09-29 09:18:08 -07:00

pid.c

[PATCH] introduce get_task_pid() to fix unsafe get_pid()

2006-10-02 07:57:25 -07:00

posix-cpu-timers.c

[PATCH] posix-cpu-timers: prevent signal delivery starvation

2006-10-17 08:18:43 -07:00

posix-timers.c

fix file specification in comments

2006-10-03 23:01:26 +02:00

printk.c

[PATCH] lockdep: fix printk recursion logic

2006-10-11 11:14:24 -07:00

profile.c

[PATCH] bitmap: parse input from kernel and user buffers

2006-10-11 11:14:22 -07:00

ptrace.c

[PATCH] pidspace: is_init()

2006-09-29 09:18:12 -07:00

rcupdate.c

[PATCH] rcu: simplify/improve batch tuning

2006-10-04 07:55:31 -07:00

rcutorture.c

[PATCH] rcu: add sched torture type to rcutorture

2006-10-04 07:55:31 -07:00

relay.c

[PATCH] make kernel/relay.c __user-clean

2006-10-10 15:37:22 -07:00

resource.c

[PATCH] kernel-doc for kernel/resource.c

2006-10-03 08:03:41 -07:00

rtmutex_common.h

[PATCH] pi-futex: futex_lock_pi/futex_unlock_pi support

2006-06-27 17:32:47 -07:00

rtmutex-debug.c

Remove all inclusions of <linux/config.h>

2006-10-04 03:38:54 -04:00

rtmutex-debug.h

[PATCH] lockdep: better lock debugging

2006-07-03 15:27:01 -07:00

rtmutex-tester.c

Remove all inclusions of <linux/config.h>

2006-10-04 03:38:54 -04:00

rtmutex.c

[PATCH] clean up and remove some extra spinlocks from rtmutex

2006-09-29 09:18:09 -07:00

rtmutex.h

[PATCH] lockdep: better lock debugging

2006-07-03 15:27:01 -07:00

rwsem.c

[PATCH] lockdep: prove rwsem locking correctness

2006-07-03 15:27:04 -07:00

sched.c

[PATCH] sched: likely profiling

2006-10-11 11:14:22 -07:00

seccomp.c

…

signal.c

[PATCH] usb: fixup usb so it uses struct pid

2006-10-02 07:57:15 -07:00

softirq.c

[PATCH] check return value of cpu_callback

2006-09-29 09:18:14 -07:00

softlockup.c

[PATCH] check return value of cpu_callback

2006-09-29 09:18:14 -07:00

spinlock.c

[PATCH] Directed yield: cpu_relax variants for spinlocks and rw-locks

2006-10-01 00:39:21 -07:00

srcu.c

[PATCH] SRCU: report out-of-memory errors

2006-10-04 07:55:30 -07:00

stacktrace.c

[PATCH] lockdep: stacktrace subsystem, core

2006-07-03 15:27:02 -07:00

stop_machine.c

[PATCH] stop_machine.c copyright

2006-09-29 09:18:24 -07:00

sys_ni.c

[PATCH] fix epoll_pwait when EPOLL=n

2006-10-16 09:14:05 -07:00

sys.c

[PATCH] SRCU: report out-of-memory errors

2006-10-04 07:55:30 -07:00

sysctl.c

[PATCH] replace cad_pid by a struct pid

2006-10-02 07:57:25 -07:00

taskstats.c

[PATCH] csa: Extended system accounting over taskstats

2006-10-01 00:39:29 -07:00

time.c

[PATCH] NTP: Move all the NTP related code to ntp.c

2006-10-01 00:39:26 -07:00

timer.c

[PATCH] kill wall_jiffies

2006-10-01 00:39:27 -07:00

tsacct.c

[PATCH] csa accounting taskstats update

2006-10-01 00:39:29 -07:00

uid16.c

[PATCH] Add more prevent_tail_call()

2006-04-19 16:27:18 -07:00

unwind.c

[PATCH] unwind: fix unused variable warning when !CONFIG_MODULES

2006-09-29 09:18:11 -07:00

user.c

[PATCH] selinux: add hooks for key subsystem

2006-06-22 15:05:55 -07:00

utsname.c

[PATCH] namespaces: utsname: implement CLONE_NEWUTS flag

2006-10-02 07:57:22 -07:00

wait.c

[PATCH] uninline init_waitqueue_head()

2006-07-10 13:24:25 -07:00

workqueue.c

[PATCH] mm: kevent threads: use MPOL_DEFAULT

2006-10-11 11:14:19 -07:00