From: Nikunj A. Dadhania Date: Tue, 7 Jun 2011 10:13:22 +0000 (+0530) Subject: sched: Remove rcu_read_lock() from wake_affine() X-Git-Tag: firefly_0821_release~3680^2~4990^2~17 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2a46dae38087e62dd5fb08a6dadf1407717ed13c;p=firefly-linux-kernel-4.4.55.git sched: Remove rcu_read_lock() from wake_affine() wake_affine() is only called from one path: select_task_rq_fair(), which already has the RCU read lock held. Signed-off-by: Nikunj A. Dadhania Signed-off-by: Peter Zijlstra Cc: Paul E. McKenney Link: http://lkml.kernel.org/r/20110607101251.777.34547.stgit@IBM-009124035060.in.ibm.com Signed-off-by: Ingo Molnar --- diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 433491c2dc8f..eb98f77b38ef 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -1481,7 +1481,6 @@ static int wake_affine(struct sched_domain *sd, struct task_struct *p, int sync) * effect of the currently running task from the load * of the current CPU: */ - rcu_read_lock(); if (sync) { tg = task_group(current); weight = current->se.load.weight; @@ -1517,7 +1516,6 @@ static int wake_affine(struct sched_domain *sd, struct task_struct *p, int sync) balanced = this_eff_load <= prev_eff_load; } else balanced = true; - rcu_read_unlock(); /* * If the currently running task will sleep within