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5554788e1d
The rcu_lockdep_current_cpu_online() function currently checks only the RCU-sched data structures to determine whether or not RCU believes that a given CPU is offline. Unfortunately, there are multiple flavors of RCU, which means that there is a short window of time during which the various flavors disagree as to whether or not a given CPU is offline. This can result in false-positive lockdep-RCU splats in which some other flavor of RCU tries to do something based on its view that the CPU is online, only to get hit with a lockdep-RCU splat because RCU-sched instead believes that the CPU is offline. This commit therefore changes rcu_lockdep_current_cpu_online() to scan all RCU flavors and to consider a given CPU to be online if any of the RCU flavors believe it to be online, thus preventing these false-positive splats. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> |
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| .. | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||
| rcu.h | ||
| rcu_segcblist.c | ||
| rcu_segcblist.h | ||
| rcuperf.c | ||
| rcutorture.c | ||
| srcutiny.c | ||
| srcutree.c | ||
| sync.c | ||
| tiny.c | ||
| tree.c | ||
| tree.h | ||
| tree_exp.h | ||
| tree_plugin.h | ||
| update.c | ||