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| author |   David S. Miller <davem@davemloft.net> | 2017-10-05 17:57:03 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-05 18:19:22 -0700 |
| commit | 53954cf8c5d205624167a2bfd117cc0c1a5f3c6d (patch) | |
| tree | a287f0c80eb616758bb5212523c8fb3d8fc350a4 /kernel/rcu/tree.c | |
| parent | Merge branch 'bpftool' (diff) | |
| parent | Merge tag 'pm-4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm (diff) | |
| download | linux-dev-53954cf8c5d205624167a2bfd117cc0c1a5f3c6d.tar.xz linux-dev-53954cf8c5d205624167a2bfd117cc0c1a5f3c6d.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Just simple overlapping changes.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/rcu/tree.c')
| -rw-r--r-- | kernel/rcu/tree.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 1250e4bd4b85..b0ad62b0e7b8 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -882,6 +882,11 @@ void rcu_irq_exit(void) RCU_LOCKDEP_WARN(!irqs_disabled(), "rcu_irq_exit() invoked with irqs enabled!!!"); rdtp = this_cpu_ptr(&rcu_dynticks); + + /* Page faults can happen in NMI handlers, so check... */ + if (rdtp->dynticks_nmi_nesting) + return; + WARN_ON_ONCE(IS_ENABLED(CONFIG_RCU_EQS_DEBUG) && rdtp->dynticks_nesting < 1); if (rdtp->dynticks_nesting <= 1) { @@ -1015,6 +1020,11 @@ void rcu_irq_enter(void) RCU_LOCKDEP_WARN(!irqs_disabled(), "rcu_irq_enter() invoked with irqs enabled!!!"); rdtp = this_cpu_ptr(&rcu_dynticks); + + /* Page faults can happen in NMI handlers, so check... */ + if (rdtp->dynticks_nmi_nesting) + return; + oldval = rdtp->dynticks_nesting; rdtp->dynticks_nesting++; WARN_ON_ONCE(IS_ENABLED(CONFIG_RCU_EQS_DEBUG) && |