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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-07-01 23:50:28 +0300 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-07-18 00:59:04 +0300 |
| commit | b9a425cfcb3c473b4ca2f3dfaeaf13848f4a7976 (patch) | |
| tree | 440b7afc650a58987220eb4fffb443552363adf4 /tools/perf/util/scripting-engines/trace-event-python.c | |
| parent | 99a930b0d2b018f31474d69137f311ce3581a4c2 (diff) | |
| download | linux-b9a425cfcb3c473b4ca2f3dfaeaf13848f4a7976.tar.xz | |
rcu: Pull out wait_event*() condition into helper function
The condition for the wait_event_interruptible_timeout() that waits
to do the next force-quiescent-state scan is a bit ornate:
((gf = READ_ONCE(rsp->gp_flags)) &
RCU_GP_FLAG_FQS) ||
(!READ_ONCE(rnp->qsmask) &&
!rcu_preempt_blocked_readers_cgp(rnp))
This commit therefore pulls this condition out into a helper function
and comments its component conditions.
Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-python.c')
0 files changed, 0 insertions, 0 deletions