rcu: Make rcu_read_lock_bh_held() allow for disabled BH
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Tue, 16 Mar 2010 00:03:43 +0000 (17:03 -0700)
committerIngo Molnar <mingo@elte.hu>
Tue, 16 Mar 2010 08:57:49 +0000 (09:57 +0100)
commite3818b8dce2a934cd1521dbc4827e5238d8f45d8
tree871d73c67a9bfd84b7ed7c49e9d4027eac7e577f
parenta3d3203e4bb40f253b1541e310dc0f9305be7c84
rcu: Make rcu_read_lock_bh_held() allow for disabled BH

Disabling BH can stand in for rcu_read_lock_bh(), and this patch
updates rcu_read_lock_bh_held() to allow for this.  In order to
avoid include-file hell, this function is moved out of line to
kernel/rcupdate.c.

This fixes a false positive RCU warning.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Lai Jiangshan <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: <20100316000343.GA25857@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
include/linux/rcupdate.h
kernel/rcupdate.c