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rcu: Add warning to rcu_idle_enter() for irqs enabled 

All current callers of rcu_idle_enter() have irqs disabled, and
rcu_idle_enter() relies on this, but doesn't check.  This commit
therefore adds a RCU_LOCKDEP_WARN() to add some verification to the trust.
While we are there, pass "true" rather than "1" to rcu_eqs_enter().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
hifive-unleashed-5.1
Paul E. McKenney 2017-07-12 09:03:35 -07:00
parent 3a60799269
commit d4db30af51
1 changed files with 2 additions and 1 deletions
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3
kernel/rcu/tree.c
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@ -859,7 +859,8 @@ EXPORT_SYMBOL_GPL(rcu_idle_enter);
*/
void rcu_user_enter(void)
{
rcu_eqs_enter(1);
RCU_LOCKDEP_WARN(!irqs_disabled(), "rcu_user_enter() invoked with irqs enabled!!!");
rcu_eqs_enter(true);
}
#endif /* CONFIG_NO_HZ_FULL */