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rcu: Update rcu_preempt_deferred_qs() comments for !PREEMPT kernels
authorZqiang <qiang1.zhang@intel.com>
Mon, 20 Jun 2022 06:42:24 +0000 (14:42 +0800)
committerPaul E. McKenney <paulmck@kernel.org>
Wed, 31 Aug 2022 12:03:14 +0000 (05:03 -0700)
commitbca4fa8cb0f4c096b515952f64e560fd784a0514
tree32d712971b2e6afffcd155b4ba6beb3da2eb6cddtree | snapshot
parent6d60ea03ac2d3dcf6ddee6b45aa7213d8b0461c5commit | diff
rcu: Update rcu_preempt_deferred_qs() comments for !PREEMPT kernels

In non-premptible kernels, tasks never do context switches within
RCU read-side critical sections.  Therefore, in such kernels, each
leaf rcu_node structure's ->blkd_tasks list will always be empty.
The comment on the non-preemptible version of rcu_preempt_deferred_qs()
confuses this point, so this commit therefore fixes it.

Signed-off-by: Zqiang <qiang1.zhang@intel.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
kernel/rcu/tree_plugin.h diff | blob | history
Domain: System / Kernel;