diff options
| author |   Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2010-03-03 07:46:57 -0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2010-03-04 12:09:19 +0100 |
| commit | 54dbf96c921513bf98484a20ef366d51944a4c4d (patch) | |
| tree | cb88fa12a8ac0e7cc8c6380781c46d1c6149c027 /kernel | |
| parent | rcu, ftrace: Fix RCU lockdep splat in ftrace_perf_buf_prepare() (diff) | |
| download | linux-dev-54dbf96c921513bf98484a20ef366d51944a4c4d.tar.xz linux-dev-54dbf96c921513bf98484a20ef366d51944a4c4d.zip | |
rcu: Suppress RCU lockdep warnings during early boot
RCU is used during very early boot, before RCU and lockdep have
been initialized. So make the underlying primitives
(rcu_read_lock_held(), rcu_read_lock_bh_held(),
rcu_read_lock_sched_held(), and rcu_dereference_check()) check
for early boot via the rcu_scheduler_active flag. This will
suppress false positives.
Also introduce a debug_lockdep_rcu_enabled() static inline
helper function, which tags the CONTINUE_PROVE_RCU case as
likely(), as suggested by Ingo Molnar.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: mathieu.desnoyers@polymtl.ca
Cc: josh@joshtriplett.org
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
Cc: Valdis.Kletnieks@vt.edu
Cc: dhowells@redhat.com
LKML-Reference: <1267631219-8713-2-git-send-email-paulmck@linux.vnet.ibm.com>
[ v2: removed incomplete debug_lockdep_rcu_update() bits ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions