rcu: Make rcu_read_lock_sched_held() handle !PREEMPT
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Thu, 4 Mar 2010 01:50:16 +0000 (17:50 -0800)
committerIngo Molnar <mingo@elte.hu>
Thu, 4 Mar 2010 11:07:33 +0000 (12:07 +0100)
commite6033e3b307fcfae08408e0673266db38392bda4
treefd8d37b2aee0a1a22499297df4b748ace5166df7
parentcc5b83a9f884fe8722a275069a5a6fde39988455
rcu: Make rcu_read_lock_sched_held() handle !PREEMPT

The rcu_read_lock_sched_held() needs to unconditionally return
the value "1" in a !PREEMPT kernel, because under !PREEMPT,
-all- kernel code is implicitly preempt-disabled.  This patch
makes this happen.

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: <1267667418-32233-1-git-send-email-paulmck@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
include/linux/rcupdate.h