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Commit 06e79976 authored by Paul E. McKenney's avatar Paul E. McKenney Committed by Ingo Molnar
Browse files

rcu: Remove lockdep annotations from RCU's _notrace() API members 

The lockdep annotations rcu_read_acquire() and rcu_read_release()
might lead to infinite looping if called from lockdep.  So this patch
removes them.  Formal repost of http://lkml.org/lkml/2009/8/25/309


on the strength of Lai Jiangshan's review.

Suggested-by: default avatarLai Jiangshan <laijs@cn.fujitsu.com>
Suggested-by: default avatarMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Reviewed-by: default avatarLai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: dipankar@in.ibm.com
Cc: akpm@linux-foundation.org
Cc: josht@linux.vnet.ibm.com
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
LKML-Reference: <20090826015337.GA18904@linux.vnet.ibm.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent c935a331

include/linux/rcupdate.h

+0 −2
Original line number Diff line number Diff line
@@ -195,7 +195,6 @@ static inline notrace void rcu_read_lock_sched_notrace(void) 
{

	preempt_disable_notrace();

	__acquire(RCU_SCHED);

	rcu_read_acquire();

}



/*
@@ -211,7 +210,6 @@ static inline void rcu_read_unlock_sched(void) 
}

static inline notrace void rcu_read_unlock_sched_notrace(void)

{

	rcu_read_release();

	__release(RCU_SCHED);

	preempt_enable_notrace();

}