rcu: Shrink TINY_RCU by reworking CPU-stall ifdefs
TINY_RCU's reset_cpu_stall_ticks() and check_cpu_stalls() functions
are defined unconditionally, and are empty functions if CONFIG_RCU_TRACE
is disabled (which in turns disables detection of RCU CPU stalls).
This commit saves a few lines of source code by defining these functions
only if CONFIG_RCU_TRACE=y.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
diff --git a/kernel/rcutiny_plugin.h b/kernel/rcutiny_plugin.h
index 65ef180..0cd385ac 100644
--- a/kernel/rcutiny_plugin.h
+++ b/kernel/rcutiny_plugin.h
@@ -158,15 +158,11 @@
rcp->jiffies_stall = jiffies + rcu_jiffies_till_stall_check();
}
-#endif /* #ifdef CONFIG_RCU_TRACE */
-
static void reset_cpu_stall_ticks(struct rcu_ctrlblk *rcp)
{
-#ifdef CONFIG_RCU_TRACE
rcp->ticks_this_gp = 0;
rcp->gp_start = jiffies;
rcp->jiffies_stall = jiffies + rcu_jiffies_till_stall_check();
-#endif /* #ifdef CONFIG_RCU_TRACE */
}
static void check_cpu_stalls(void)
@@ -174,3 +170,5 @@
RCU_TRACE(check_cpu_stall(&rcu_bh_ctrlblk));
RCU_TRACE(check_cpu_stall(&rcu_sched_ctrlblk));
}
+
+#endif /* #ifdef CONFIG_RCU_TRACE */