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| author | Neeraj Upadhyay <neeraju@codeaurora.org> | 2017-08-07 11:20:10 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-24 08:37:04 +0100 |
| commit | 3594216fc6cf25636109c70208d51e1250102b32 (patch) | |
| tree | f9824cc8561be8b4b197c248a892dbe02b3e3f0c /kernel/rcu | |
| parent | a371abb25a16029932fde51eb4b12420421f96da (diff) | |
| download | linux-stable-3594216fc6cf25636109c70208d51e1250102b32.tar.gz linux-stable-3594216fc6cf25636109c70208d51e1250102b32.tar.bz2 linux-stable-3594216fc6cf25636109c70208d51e1250102b32.zip | |
rcu: Fix up pending cbs check in rcu_prepare_for_idle
commit 135bd1a230bb69a68c9808a7d25467318900b80a upstream.
The pending-callbacks check in rcu_prepare_for_idle() is backwards.
It should accelerate if there are pending callbacks, but the check
rather uselessly accelerates only if there are no callbacks. This commit
therefore inverts this check.
Fixes: 15fecf89e46a ("srcu: Abstract multi-tail callback list handling")
Signed-off-by: Neeraj Upadhyay <neeraju@codeaurora.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree_plugin.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index e012b9be777e..fed95fa941e6 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -1507,7 +1507,7 @@ static void rcu_prepare_for_idle(void) rdtp->last_accelerate = jiffies; for_each_rcu_flavor(rsp) { rdp = this_cpu_ptr(rsp->rda); - if (rcu_segcblist_pend_cbs(&rdp->cblist)) + if (!rcu_segcblist_pend_cbs(&rdp->cblist)) continue; rnp = rdp->mynode; raw_spin_lock_rcu_node(rnp); /* irqs already disabled. */ |