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Paul Walmsley dbf520a9d7 Revert "lockdep: check that no locks held at freeze time" 
This reverts commit 6aa9707099.

Commit 6aa9707099 ("lockdep: check that no locks held at freeze time")
causes problems with NFS root filesystems.  The failures were noticed on
OMAP2 and 3 boards during kernel init:

  [ BUG: swapper/0/1 still has locks held! ]
  3.9.0-rc3-00344-ga937536 #1 Not tainted
  -------------------------------------
  1 lock held by swapper/0/1:
   #0:  (&type->s_umount_key#13/1){+.+.+.}, at: [<c011e84c>] sget+0x248/0x574

  stack backtrace:
    rpc_wait_bit_killable
    __wait_on_bit
    out_of_line_wait_on_bit
    __rpc_execute
    rpc_run_task
    rpc_call_sync
    nfs_proc_get_root
    nfs_get_root
    nfs_fs_mount_common
    nfs_try_mount
    nfs_fs_mount
    mount_fs
    vfs_kern_mount
    do_mount
    sys_mount
    do_mount_root
    mount_root
    prepare_namespace
    kernel_init_freeable
    kernel_init

Although the rootfs mounts, the system is unstable.  Here's a transcript
from a PM test:

  http://www.pwsan.com/omap/testlogs/test_v3.9-rc3/20130317194234/pm/37xxevm/37xxevm_log.txt

Here's what the test log should look like:

  http://www.pwsan.com/omap/testlogs/test_v3.8/20130218214403/pm/37xxevm/37xxevm_log.txt

Mailing list discussion is here:

  http://lkml.org/lkml/2013/3/4/221

Deal with this for v3.9 by reverting the problem commit, until folks can
figure out the right long-term course of action.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Mandeep Singh Baines <msb@chromium.org>
Cc: Jeff Layton <jlayton@redhat.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: <maciej.rutecki@gmail.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ben Chan <benchan@chromium.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-31 11:38:33 -07:00
..
debug
Merge tag 'for_linux-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/kgdb
2013-03-02 08:31:39 -08:00
events
perf: Generate EXIT event only once per task context
2013-03-18 09:47:33 +01:00
gcov
…
irq
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-02-26 20:16:07 -08:00
power
…
sched
Merge branch 'for-3.9/core' of git://git.kernel.dk/linux-block
2013-02-28 12:52:24 -08:00
time
clockevents: Don't allow dummy broadcast timers
2013-03-07 17:16:11 +01:00
trace
Merge branch 'tip/perf/urgent-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/urgent
2013-03-18 09:48:29 +01:00
.gitignore
…
acct.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-02-26 20:16:07 -08:00
async.c
…
audit_tree.c
…
audit_watch.c
…
audit.c
…
audit.h
…
auditfilter.c
…
auditsc.c
…
backtracetest.c
…
bounds.c
…
capability.c
…
cgroup_freezer.c
…
cgroup.c
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
compat.c
…
configs.c
…
context_tracking.c
…
cpu_pm.c
…
cpu.c
…
cpuset.c
…
crash_dump.c
…
cred.c
…
delayacct.c
…
dma.c
…
elfcore.c
…
exec_domain.c
…
exit.c
Revert "lockdep: check that no locks held at freeze time"
2013-03-31 11:38:33 -07:00
extable.c
…
fork.c
userns: Don't allow CLONE_NEWUSER | CLONE_FS
2013-03-13 15:00:20 -07:00
freezer.c
…
futex_compat.c
…
futex.c
futex: fix kernel-doc notation and spello
2013-03-12 20:42:10 -07:00
groups.c
…
hrtimer.c
…
hung_task.c
…
irq_work.c
…
itimer.c
…
jump_label.c
…
kallsyms.c
…
kcmp.c
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
…
kexec.c
kexec: avoid freeing NULL pointer in image_crash_alloc()
2013-02-27 19:10:12 -08:00
kmod.c
…
kprobes.c
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
ksysfs.c
…
kthread.c
…
latencytop.c
…
lglock.c
…
lockdep_internals.h
…
lockdep_proc.c
…
lockdep_states.h
…
lockdep.c
Revert "lockdep: check that no locks held at freeze time"
2013-03-31 11:38:33 -07:00
Makefile
Merge branch 'akpm' (final batch from Andrew)
2013-02-27 20:58:09 -08:00
modsign_certificate.S
…
modsign_pubkey.c
…
module_signing.c
…
module-internal.h
…
module.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-02-26 20:16:07 -08:00
mutex-debug.c
…
mutex-debug.h
…
mutex.c
…
mutex.h
…
notifier.c
…
nsproxy.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-02-26 20:16:07 -08:00
padata.c
…
panic.c
…
params.c
…
pid_namespace.c
pid: Handle the exit of a multi-threaded init.
2013-03-26 03:41:23 -07:00
pid.c
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
posix-cpu-timers.c
…
posix-timers.c
posix-timers: convert to idr_alloc()
2013-02-27 19:10:19 -08:00
printk.c
printk: Provide a wake_up_klogd() off-case
2013-03-22 16:41:20 -07:00
profile.c
…
ptrace.c
…
range.c
…
rcu.h
…
rcupdate.c
…
rcutiny_plugin.h
…
rcutiny.c
…
rcutorture.c
…
rcutree_plugin.h
…
rcutree_trace.c
…
rcutree.c
…
rcutree.h
…
relay.c
…
res_counter.c
…
resource.c
…
rtmutex_common.h
…
rtmutex-debug.c
…
rtmutex-debug.h
…
rtmutex-tester.c
…
rtmutex.c
…
rtmutex.h
…
rwsem.c
…
seccomp.c
…
semaphore.c
…
signal.c
kernel/signal.c: use __ARCH_HAS_SA_RESTORER instead of SA_RESTORER
2013-03-13 15:21:45 -07:00
smp.c
…
smpboot.c
Revert parts of "hlist: drop the node parameter from iterators"
2013-03-08 15:05:34 -08:00
smpboot.h
…
softirq.c
Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-03-05 18:10:04 -08:00
spinlock.c
…
srcu.c
…
stacktrace.c
…
stop_machine.c
stop_machine: Mark per cpu stopper enabled early
2013-02-26 22:25:17 +01:00
sys_ni.c
…
sys.c
poweroff: change orderly_poweroff() to use schedule_work()
2013-03-22 16:41:20 -07:00
sysctl_binary.c
sysctl: fix null checking in bin_dn_node_address()
2013-02-27 19:10:21 -08:00
sysctl.c
Merge tag 'arc-v3.9-rc1-late' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
2013-03-02 07:58:56 -08:00
task_work.c
…
taskstats.c
…
test_kprobes.c
…
time.c
…
timeconst.bc
…
timer.c
…
tracepoint.c
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
tsacct.c
…
uid16.c
…
up.c
…
user_namespace.c
userns: Restrict when proc and sysfs can be mounted
2013-03-27 07:50:08 -07:00
user-return-notifier.c
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
user.c
userns: Restrict when proc and sysfs can be mounted
2013-03-27 07:50:08 -07:00
utsname_sysctl.c
kernel/utsname_sysctl.c: put get/get_uts() into CONFIG_PROC_SYSCTL code block
2013-02-27 19:10:22 -08:00
utsname.c
kernel/utsname.c: fix wrong comment about clone_uts_ns()
2013-02-27 19:10:22 -08:00
wait.c
…
watchdog.c
…
workqueue_internal.h
…
workqueue.c
Merge branch 'for-3.9-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
2013-03-18 18:47:07 -07:00