Prarit Bhargava ee527cd3a2 Use stop_machine_run in the Intel RNG driver ...

Replace call_smp_function with stop_machine_run in the Intel RNG driver.

CPU A has done read_lock(&lock)
CPU B has done write_lock_irq(&lock) and is waiting for A to release the lock.

A third CPU calls call_smp_function and issues the IPI.  CPU A takes CPU
C's IPI.  CPU B is waiting with interrupts disabled and does not see the
IPI.  CPU C is stuck waiting for CPU B to respond to the IPI.

Deadlock.

The solution is to use stop_machine_run instead of call_smp_function
(call_smp_function should not be called in situations where the CPUs may be
suspended).

[haruo.tomita@toshiba.co.jp: fix a typo in mod_init()]
[haruo.tomita@toshiba.co.jp: fix memory leak]
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Cc: Jan Beulich <jbeulich@novell.com>
Cc: "Tomita, Haruo" <haruo.tomita@toshiba.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2007-05-08 11:15:00 -07:00

..

irq

MSI: arch must connect the irq and the msi_desc

2007-05-02 19:02:38 -07:00

power

freezer: task->exit_state should be treated as bolean

2007-05-08 11:14:58 -07:00

time

[PATCH] fix jiffies clocksource inittime

2007-04-04 21:12:47 -07:00

.gitignore

…

acct.c

[PATCH] kernel: change uses of f_{dentry, vfsmnt} to use f_path

2006-12-08 08:28:42 -08:00

audit.c

[NETLINK]: Switch cb_lock spinlock to mutex and allow to override it

2007-04-25 22:29:03 -07:00

audit.h

[PATCH] audit: AUDIT_PERM support

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

auditfilter.c

[PATCH] minor update to rule add/delete messages (ver 2)

2007-02-17 21:30:09 -05:00

auditsc.c

[PATCH] fix deadlock in audit_log_task_context()

2007-03-14 15:27:48 -07:00

capability.c

[PATCH] pid: replace do/while_each_task_pid with do/while_each_pid_task

2007-02-12 09:48:32 -08:00

compat.c

[PATCH] Common compat_sys_sysinfo

2007-02-11 10:51:32 -08:00

configs.c

[PATCH] struct seq_operations and struct file_operations constification

2006-12-07 08:39:46 -08:00

cpu.c

[PATCH] Fix microcode-related suspend problem

2007-04-02 10:06:09 -07:00

cpuset.c

cpusets: allow TIF_MEMDIE threads to allocate anywhere

2007-05-07 12:12:53 -07:00

delayacct.c

KMEM_CACHE(): simplify slab cache creation

2007-05-07 12:12:55 -07:00

dma.c

[PATCH] struct seq_operations and struct file_operations constification

2006-12-07 08:39:46 -08:00

exec_domain.c

Remove obsolete #include <linux/config.h>

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

exit.c

Return EPERM not ECHILD on security_task_wait failure

2007-05-07 12:12:57 -07:00

extable.c

…

fork.c

slab allocators: Remove SLAB_DEBUG_INITIAL flag

2007-05-07 12:12:57 -07:00

futex_compat.c

[PATCH] __user annotations: futex

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

futex.c

[PATCH] futex: PI state locking fix

2007-03-16 19:25:06 -07:00

hrtimer.c

[NET]: Fix networking compilation errors

2007-04-27 15:31:24 -07:00

itimer.c

[PATCH] hrtimers: prevent possible itimer DoS

2007-02-16 08:13:59 -08:00

kallsyms.c

Extend print_symbol capability

2007-04-30 16:40:39 -07:00

Kconfig.hz

[PATCH] HZ: 300Hz support

2006-12-07 08:39:36 -08:00

Kconfig.preempt

…

kexec.c

Merge branch 'release' of master.kernel.org:/pub/scm/linux/kernel/git/aegl/linux-2.6

2006-12-07 15:39:22 -08:00

kfifo.c

[PATCH] Numerous fixes to kernel-doc info in source files.

2007-02-11 10:51:32 -08:00

kmod.c

Revert "Driver core: let request_module() send a /sys/modules/kmod/-uevent"

2007-02-23 14:54:57 -08:00

kprobes.c

[PATCH] kprobes: list all active probes in the system

2007-02-20 17:10:14 -08:00

ksysfs.c

remove "struct subsystem" as it is no longer needed

2007-05-02 18:57:59 -07:00

kthread.c

[PATCH] Numerous fixes to kernel-doc info in source files.

2007-02-11 10:51:32 -08:00

latency.c

[PATCH] severing module.h->sched.h

2006-12-04 02:00:22 -05:00

lockdep_internals.h

[PATCH] lockdep: more chains

2006-12-07 08:39:43 -08:00

lockdep_proc.c

[PATCH] remove many unneeded #includes of sched.h

2007-02-14 08:09:54 -08:00

lockdep.c

simplify the stacktrace code

2007-05-08 11:14:58 -07:00

Makefile

[PATCH] sysctl: move utsname sysctls to their own file

2007-02-14 08:09:58 -08:00

module.c

module: use krealloc

2007-05-08 11:15:00 -07:00

mutex-debug.c

[PATCH] remove many unneeded #includes of sched.h

2007-02-14 08:09:54 -08:00

mutex-debug.h

[PATCH] lockdep: better lock debugging

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

mutex.c

[PATCH] lockdep: avoid lockdep warning in md

2006-12-08 08:28:39 -08:00

mutex.h

[PATCH] lockdep: prove mutex locking correctness

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

nsproxy.c

Revert "[PATCH] namespaces: fix exit race by splitting exit"

2007-01-30 13:35:18 -08:00

panic.c

[PATCH] Add TAINT_USER and ability to set taint flags from userspace

2007-02-11 10:51:29 -08:00

params.c

remove "struct subsystem" as it is no longer needed

2007-05-02 18:57:59 -07:00

pid.c

KMEM_CACHE(): simplify slab cache creation

2007-05-07 12:12:55 -07:00

posix-cpu-timers.c

[PATCH] posix timers: RCU optimization for clock_gettime()

2007-02-16 08:14:00 -08:00

posix-timers.c

[PATCH] hrtimers: add high resolution timer support

2007-02-16 08:13:59 -08:00

printk.c

kernel/printk.c: comment fix

2007-02-17 20:10:16 +01:00

profile.c

[PATCH] proc: remove useless (and buggy) ->nlink settings

2007-02-11 10:51:32 -08:00

ptrace.c

[PATCH] pidspace: is_init()

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

rcupdate.c

[PATCH] rcu: add a prefetch() in rcu_do_batch()

2006-12-07 08:39:40 -08:00

rcutorture.c

[PATCH] Publish rcutorture module parameters via sysfs, read-only

2007-03-06 09:30:25 -08:00

relay.c

[PATCH] kernel-doc fixes for 2.6.20-git15 (non-drivers)

2007-03-01 14:53:37 -08:00

resource.c

libata/IDE: remove combined mode quirk

2007-04-28 14:15:59 -04:00

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

[PATCH] Add include/linux/freezer.h and move definitions from sched.h

2006-12-07 08:39:27 -08:00

rtmutex.c

[PATCH] hrtimers: namespace and enum cleanup

2007-02-16 08:13:58 -08:00

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

Safer nr_node_ids and nr_node_ids determination and initial values

2007-05-07 12:12:51 -07:00

seccomp.c

…

signal.c

KMEM_CACHE(): simplify slab cache creation

2007-05-07 12:12:55 -07:00

softirq.c

[PATCH] tick-management: dyntick / highres functionality

2007-02-16 08:13:59 -08:00

softlockup.c

softlockup: s/99/MAX_RT_PRIO/

2007-05-08 11:14:59 -07:00

spinlock.c

[PATCH] lockdep: spin_lock_irqsave_nested()

2006-11-25 13:28:34 -08:00

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

Use stop_machine_run in the Intel RNG driver

2007-05-08 11:15:00 -07:00

sys_ni.c

[PATCH] Create compat_sys_migrate_pages

2006-11-03 12:27:59 -08:00

sys.c

remove software_suspend()

2007-05-07 12:12:59 -07:00

sysctl.c

Allow reading tainted flag as user

2007-04-24 08:23:08 -07:00

taskstats.c

KMEM_CACHE(): simplify slab cache creation

2007-05-07 12:12:55 -07:00

time.c

[TCP] tcp_probe: improvements for net-2.6.22

2007-04-25 22:28:10 -07:00

timer.c

[AF_RXRPC]: Make it possible to merely try to cancel timers from a module

2007-04-26 15:46:56 -07:00

tsacct.c

[PATCH] time: x86_64: split x86_64/kernel/time.c up

2007-02-16 08:14:00 -08:00

uid16.c

…

user.c

[PATCH] slab: remove kmem_cache_t

2006-12-07 08:39:25 -08:00

utsname_sysctl.c

[PATCH] sysctl: remove insert_at_head from register_sysctl

2007-02-14 08:09:59 -08:00

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] Add debugging feature /proc/timer_stat

2007-02-16 08:13:59 -08:00