linux-stable-rt/kernel
Linus Torvalds 093a07e2fd Fix locking bug in "acquire_console_semaphore_for_printk()"
When I cleaned up printk() and split up the printk locking logic in
commit 266c2e0abe ("Make printk() console
semaphore accesses sensible") I had incorrectly moved the call to
have_callable_console() outside of the console semaphore.

That was buggy.  The console semaphore protects the console_drivers list
that is used by have_callable_console().

Thanks go to Bongani Hlope who saw this as a hang on shutdown and reboot
and bisected the bug to the right commit, and tested this patch. See

	http://lkml.org/lkml/2008/4/11/315

Bisected-and-tested-by: Bongani Hlope <bonganilinux@mweb.co.za>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-15 13:09:54 -07:00
..
irq
power Merge branches 'release' and 'doc' into release 2008-03-13 01:59:53 -04:00
time clocksource: revert: use init_timer_deferrable for clocksource_watchdog 2008-03-25 20:13:25 +01:00
.gitignore
Kconfig.hz
Kconfig.preempt rcu: move PREEMPT_RCU config option back under PREEMPT 2008-03-10 18:01:20 -07:00
Makefile
acct.c bsd_acct: using task_struct->tgid is not right in pid-namespaces 2008-03-24 19:22:20 -07:00
audit.c audit: silence two kerneldoc warnings in kernel/audit.c 2008-03-28 14:45:21 -07:00
audit.h
audit_tree.c
auditfilter.c
auditsc.c
backtracetest.c
capability.c
cgroup.c cgroups: include hierarchy ids in /proc/<pid>/cgroup 2008-04-11 08:06:43 -07:00
cgroup_debug.c
compat.c
configs.c
cpu.c
cpuset.c cpusets: fix obsolete comment 2008-03-05 17:53:33 -08:00
delayacct.c
dma.c
exec_domain.c
exit.c asmlinkage_protect replaces prevent_tail_call 2008-04-10 17:28:26 -07:00
extable.c
fork.c memcgroup: fix spurious EBUSY on memory cgroup removal 2008-03-28 14:45:21 -07:00
futex.c NULL noise: fs/*, mm/*, kernel/* 2008-03-30 14:18:41 -07:00
futex_compat.c futex_compat __user annotation 2008-03-30 14:18:41 -07:00
hrtimer.c
itimer.c
kallsyms.c
kexec.c
kfifo.c
kmod.c
kprobes.c kprobes: fix a null pointer bug in register_kretprobe() 2008-03-04 16:35:19 -08:00
ksysfs.c
kthread.c
latencytop.c
lockdep.c
lockdep_internals.h
lockdep_proc.c
marker.c markers: use synchronize_sched() 2008-04-02 15:28:19 -07:00
module.c modules: warn about suspicious return values from module's ->init() hook 2008-03-10 18:01:20 -07:00
mutex-debug.c
mutex-debug.h
mutex.c
mutex.h
notifier.c
ns_cgroup.c
nsproxy.c
panic.c
params.c
pid.c
pid_namespace.c
pm_qos_params.c
posix-cpu-timers.c
posix-timers.c
printk.c Fix locking bug in "acquire_console_semaphore_for_printk()" 2008-04-15 13:09:54 -07:00
profile.c
ptrace.c
rcuclassic.c
rcupdate.c
rcupreempt.c
rcupreempt_trace.c
rcutorture.c
relay.c relay: set an spd_release() hook for splice 2008-03-26 12:04:09 +01:00
res_counter.c Memory Resource Controller use strstrip while parsing arguments 2008-03-04 16:35:09 -08:00
resource.c
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c
rtmutex.h
rtmutex_common.h
rwsem.c
sched.c NOHZ: reevaluate idle sleep length after add_timer_on() 2008-03-26 08:28:55 +01:00
sched_debug.c sched: improve affine wakeups 2008-03-19 04:27:53 +01:00
sched_fair.c revert "sched: fix fair sleepers" 2008-04-14 14:26:23 +02:00
sched_idletask.c
sched_rt.c sched: balance RT task resched only on runqueue 2008-03-07 16:43:00 +01:00
sched_stats.h
seccomp.c
signal.c freezer vs stopped or traced 2008-03-04 07:59:54 -08:00
softirq.c
softlockup.c
spinlock.c
srcu.c
stacktrace.c
stop_machine.c
sys.c
sys_ni.c
sysctl.c sched: revert load_balance_monitor() changes 2008-03-04 17:54:06 +01:00
sysctl_check.c
taskstats.c
test_kprobes.c
time.c
timeconst.pl
timer.c NOHZ: reevaluate idle sleep length after add_timer_on() 2008-03-26 08:28:55 +01:00
tsacct.c
uid16.c asmlinkage_protect replaces prevent_tail_call 2008-04-10 17:28:26 -07:00
user.c
user_namespace.c
utsname.c
utsname_sysctl.c
wait.c
workqueue.c