Pavel Emelianov 428e6ce023 Lockdep treats down_write_trylock like regular down_write ...

This causes constructions like

down_write(&mm1->mmap_sem);
if (down_write_trylock(&mm2->mmap_sem)) {
       ...
       up_write(&mm2->mmap_sem);
}
up_write(&mm1->mmap_sem);

generate a lockdep warning about circular locking dependence.

Call rwsem_acquire() with trylock set to 1.

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2007-05-08 11:15:09 -07:00

..

irq

IRQ: check for PERCPU flag only when adding first irqaction

2007-05-08 11:15:06 -07:00

power

header cleaning: don't include smp_lock.h when not used

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

time

Fix race between cat /proc/*/wchan and rmmod et al

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

.gitignore

gitignore: ignore more generated files

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

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

header cleaning: don't include smp_lock.h when not used

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

delayacct.c

KMEM_CACHE(): simplify slab cache creation

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

die_notifier.c

move die notifier handling to common code

2007-05-08 11:15:04 -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

header cleaning: don't include smp_lock.h when not used

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

extable.c

[PATCH] symbol_put_addr() locks kernel

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

fork.c

header cleaning: don't include smp_lock.h when not used

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

futex_compat.c

[PATCH] __user annotations: futex

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

futex.c

futex: restartable futex_wait

2007-05-08 11:15:03 -07:00

hrtimer.c

[NET]: Fix networking compilation errors

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

itimer.c

header cleaning: don't include smp_lock.h when not used

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

kallsyms.c

Fix race between cat /proc/slab_allocators and rmmod

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

Kconfig.hz

[PATCH] HZ: 300Hz support

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

Kconfig.preempt

[PATCH] sched: voluntary kernel preemption

2005-06-25 16:24:45 -07:00

kexec.c

kdump/kexec: calculate note size at compile time

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

kfifo.c

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

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

kmod.c

Fix kevent's childs priority greediness

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

kprobes.c

Simplify kallsyms_lookup()

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

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 kallsyms_lookup()

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

Makefile

move die notifier handling to common code

2007-05-08 11:15:04 -07:00

module.c

Fix race between cat /proc/slab_allocators and rmmod

2007-05-08 11:15:08 -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

Merge sys_clone()/sys_unshare() nsproxy and namespace handling

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

panic.c

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

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

params.c

kernel/params.c: fix lying comment for param_array()

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

pid.c

Merge sys_clone()/sys_unshare() nsproxy and namespace handling

2007-05-08 11:15:00 -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

header cleaning: don't include smp_lock.h when not used

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

printk.c

header cleaning: don't include smp_lock.h when not used

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

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

rcutorture: Mark rcu_torture_init as __init

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

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

Lockdep treats down_write_trylock like regular down_write

2007-05-08 11:15:09 -07:00

sched.c

add touch_all_softlockup_watchdogs()

2007-05-08 11:15:06 -07:00

seccomp.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

signal.c

header cleaning: don't include smp_lock.h when not used

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

softirq.c

[PATCH] tick-management: dyntick / highres functionality

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

softlockup.c

add touch_all_softlockup_watchdogs()

2007-05-08 11:15:06 -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

proc: maps protection

2007-05-08 11:15:02 -07:00

taskstats.c

KMEM_CACHE(): simplify slab cache creation

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

time.c

header cleaning: don't include smp_lock.h when not used

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

timer.c

Move timekeeping code to timekeeping.c

2007-05-08 11:15:06 -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

header cleaning: don't include smp_lock.h when not used

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

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

Merge sys_clone()/sys_unshare() nsproxy and namespace handling

2007-05-08 11:15:00 -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