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rcu: Use wrapper for lockdep asserts

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Commits c0b334c5bf and ea9b0c8a26 introduced new sparse warnings
by accessing rcu_node->lock directly and ignoring the __private
marker.  Introduce a new wrapper and use it.  Also fix a similar problem
in srcutree.c introduced by a3883df393.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Matthew Wilcox 2018-01-17 06:24:30 -08:00 • committed by Paul E. McKenney
parent 65518db86b
commit a32e01ee68
4 changed files with 19 additions and 16 deletions
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kernel/rcu/srcutree.c
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@ -439,7 +439,7 @@ static void srcu_gp_start(struct srcu_struct *sp)
struct srcu_data *sdp = this_cpu_ptr(sp->sda);
int state;
lockdep_assert_held(&sp->lock);
lockdep_assert_held(&ACCESS_PRIVATE(sp, lock));
WARN_ON_ONCE(ULONG_CMP_GE(sp->srcu_gp_seq, sp->srcu_gp_seq_needed));
rcu_segcblist_advance(&sdp->srcu_cblist,
rcu_seq_current(&sp->srcu_gp_seq));