Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'core-urgent-2020-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU fix from Thomas Gleixner:
"A single bugfix for RCU to prevent taking a lock in NMI context"
* tag 'core-urgent-2020-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
rcu: Don't acquire lock in NMI handler in rcu_nmi_enter_common()
+1
-1
+1
-1
kernel/rcu/tree.c
+1
-1
kernel/rcu/tree.c
···
825
825
rcu_cleanup_after_idle();
826
826
827
827
incby = 1;
828
-
} else if (tick_nohz_full_cpu(rdp->cpu) &&
828
+
} else if (irq && tick_nohz_full_cpu(rdp->cpu) &&
829
829
rdp->dynticks_nmi_nesting == DYNTICK_IRQ_NONIDLE &&
830
830
READ_ONCE(rdp->rcu_urgent_qs) &&
831
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!READ_ONCE(rdp->rcu_forced_tick)) {