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3063b33a34
If the caller of of call_rcu_tasks(), call_rcu_tasks_rude(), or call_rcu_tasks_trace() holds a raw spinlock, and then if call_rcu_tasks_generic() determines that the grace-period kthread must be awakened, then the wakeup might acquire a normal spinlock while a raw spinlock is held. This results in lockdep splats when the kernel is built with CONFIG_PROVE_RAW_LOCK_NESTING=y. This commit therefore defers the wakeup using irq_work_queue(). It would be nice to directly invoke wakeup when a raw spinlock is not held, but there is currently no way to check for this in all kernels. Reported-by: Martin Lau <kafai@fb.com> Cc: Neeraj Upadhyay <neeraj.iitr10@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
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| .. | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||
| rcu_segcblist.c | ||
| rcu_segcblist.h | ||
| rcu.h | ||
| rcuscale.c | ||
| rcutorture.c | ||
| refscale.c | ||
| srcutiny.c | ||
| srcutree.c | ||
| sync.c | ||
| tasks.h | ||
| tiny.c | ||
| tree_exp.h | ||
| tree_nocb.h | ||
| tree_plugin.h | ||
| tree_stall.h | ||
| tree.c | ||
| tree.h | ||
| update.c | ||