From 51952bc633064311410b041fad38da1614f4539e Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Tue, 21 Apr 2015 11:15:30 -0700 Subject: rcu: Further shrink Tiny RCU by making empty functions static inlines The Tiny RCU counterparts to rcu_idle_enter(), rcu_idle_exit(), rcu_irq_enter(), and rcu_irq_exit() are empty functions, but each has EXPORT_SYMBOL_GPL(), which needlessly consumes extra memory, especially in kernels built with module support. This commit therefore moves these functions to static inlines in rcutiny.h, removing the need for exports. This won't affect the size of the tiniest kernels, which are likely built without module support, but might help semi-tiny kernels that might include module support. Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett --- kernel/rcu/tiny.c | 33 --------------------------------- 1 file changed, 33 deletions(-) (limited to 'kernel/rcu') diff --git a/kernel/rcu/tiny.c b/kernel/rcu/tiny.c index 069742d61c68..a501b4ab9b1c 100644 --- a/kernel/rcu/tiny.c +++ b/kernel/rcu/tiny.c @@ -49,39 +49,6 @@ static void __call_rcu(struct rcu_head *head, #include "tiny_plugin.h" -/* - * Enter idle, which is an extended quiescent state if we have fully - * entered that mode. - */ -void rcu_idle_enter(void) -{ -} -EXPORT_SYMBOL_GPL(rcu_idle_enter); - -/* - * Exit an interrupt handler towards idle. - */ -void rcu_irq_exit(void) -{ -} -EXPORT_SYMBOL_GPL(rcu_irq_exit); - -/* - * Exit idle, so that we are no longer in an extended quiescent state. - */ -void rcu_idle_exit(void) -{ -} -EXPORT_SYMBOL_GPL(rcu_idle_exit); - -/* - * Enter an interrupt handler, moving away from idle. - */ -void rcu_irq_enter(void) -{ -} -EXPORT_SYMBOL_GPL(rcu_irq_enter); - #if defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_RCU_TRACE) /* -- cgit v1.2.3