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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-12-07 13:09:52 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-12-07 16:59:37 -0800
commit79cfea0273876d9c438f3227b8f68c8c7ae31583 (patch)
treeb147a1c382fd50ac1ee5113ea851b517bf3405df /kernel/rcu/update.c
parent3e42ec1aa716f10c68294b8492ae3ea684528699 (diff)
downloadlinux-sh-79cfea0273876d9c438f3227b8f68c8c7ae31583.tar.gz
rcu: Remove TINY_RCU bloat from pointless boot parameters
The rcu_expedited, rcu_normal, and rcu_normal_after_boot kernel boot parameters are pointless in the case of TINY_RCU because in that case synchronous grace periods, both expedited and normal, are no-ops. However, these three symbols contribute several hundred bytes of bloat. This commit therefore uses CPP directives to avoid compiling this code in TINY_RCU kernels. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcu/update.c')
-rw-r--r--kernel/rcu/update.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c
index 12b91f5a60a6..76b94e19430b 100644
--- a/kernel/rcu/update.c
+++ b/kernel/rcu/update.c
@@ -60,11 +60,12 @@ MODULE_ALIAS("rcupdate");
#endif
#define MODULE_PARAM_PREFIX "rcupdate."
+#ifndef CONFIG_TINY_RCU
module_param(rcu_expedited, int, 0);
module_param(rcu_normal, int, 0);
-
static int rcu_normal_after_boot;
module_param(rcu_normal_after_boot, int, 0);
+#endif /* #ifndef CONFIG_TINY_RCU */
#if defined(CONFIG_DEBUG_LOCK_ALLOC) && defined(CONFIG_PREEMPT_COUNT)
/**
@@ -172,8 +173,6 @@ void rcu_unexpedite_gp(void)
}
EXPORT_SYMBOL_GPL(rcu_unexpedite_gp);
-#endif /* #ifndef CONFIG_TINY_RCU */
-
/*
* Inform RCU of the end of the in-kernel boot sequence.
*/
@@ -185,6 +184,8 @@ void rcu_end_inkernel_boot(void)
WRITE_ONCE(rcu_normal, 1);
}
+#endif /* #ifndef CONFIG_TINY_RCU */
+
#ifdef CONFIG_PREEMPT_RCU
/*