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| author | Paul E. McKenney <paul.mckenney@linaro.org> | 2012-08-03 02:43:50 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2012-09-23 16:43:55 +0200 |
| commit | 1331e7a1bbe1f11b19c4327ba0853bee2a606543 (patch) | |
| tree | 596d9ed379ef7e2c5d8cf1cc0ba56ade084548ec /scripts | |
| parent | rcu: Fix day-one dyntick-idle stall-warning bug (diff) | |
| download | linux-1331e7a1bbe1f11b19c4327ba0853bee2a606543.tar.xz linux-1331e7a1bbe1f11b19c4327ba0853bee2a606543.zip | |
rcu: Remove _rcu_barrier() dependency on __stop_machine()
Currently, _rcu_barrier() relies on preempt_disable() to prevent
any CPU from going offline, which in turn depends on CPU hotplug's
use of __stop_machine().
This patch therefore makes _rcu_barrier() use get_online_cpus() to
block CPU-hotplug operations. This has the added benefit of removing
the need for _rcu_barrier() to adopt callbacks: Because CPU-hotplug
operations are excluded, there can be no callbacks to adopt. This
commit simplifies the code accordingly.
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions