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(parent: 8d672fa) | patch
rcu: Make rcu_report_unblock_qs_rnp() warn on violated preconditions
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Fri, 27 Apr 2018 21:05:27 +0000 (14:05 -0700)
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Thu, 12 Jul 2018 22:38:59 +0000 (15:38 -0700)
commitc74859d1eb2d8578bdf6d78ba893e394085aba1a
tree17e12f56714e9567ea66307fc582abd06f523dd6tree | snapshot
parent8d672fa6bf68ffc36a0c5e4868499f86bbea2308commit | diff
rcu: Make rcu_report_unblock_qs_rnp() warn on violated preconditions

If rcu_report_unblock_qs_rnp() is invoked on something other than
preemptible RCU or if there are still preempted tasks blocking the
current grace period, something went badly wrong in the caller.
This commit therefore adds WARN_ON_ONCE() to these conditions, but
leaving the legitimate reason for early exit (rnp->qsmask != 0)
unwarned.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
kernel/rcu/tree.c diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git