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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2013-11-18 06:25:48 +0400
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-02-18 03:32:48 +0400
commit2f33b512a5460578f6cf11d7b7867bed53157c7c (patch)
treebaa9491f327de99495174da0b6eb9be12b1d8b57 /include
parent6d0abeca3242a88cab8232e4acd7e2bf088f3bc2 (diff)
downloadlinux-2f33b512a5460578f6cf11d7b7867bed53157c7c.tar.xz
rcu: Optimize rcu_is_nocb_cpu() for RCU_NOCB_CPU_ALL
If CONFIG_RCU_NOCB_CPU_ALL=y, then rcu_is_nocb_cpu() will always return true, however, the current version nevertheless checks rcu_nocb_mask. This commit therefore creates a static inline implementation of rcu_is_nocb_cpu() that unconditionally returns true when CONFIG_RCU_NOCB_CPU_ALL=y. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/rcupdate.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 72bf3a01a4ee..281c90f8989e 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -1015,11 +1015,13 @@ static inline notrace void rcu_read_unlock_sched_notrace(void)
#define kfree_rcu(ptr, rcu_head) \
__kfree_rcu(&((ptr)->rcu_head), offsetof(typeof(*(ptr)), rcu_head))
-#ifdef CONFIG_RCU_NOCB_CPU
+#if defined(CONFIG_RCU_NOCB_CPU_ALL)
+static inline bool rcu_is_nocb_cpu(int cpu) { return true; }
+#elif defined(CONFIG_RCU_NOCB_CPU)
bool rcu_is_nocb_cpu(int cpu);
#else
static inline bool rcu_is_nocb_cpu(int cpu) { return false; }
-#endif /* #else #ifdef CONFIG_RCU_NOCB_CPU */
+#endif
/* Only for use by adaptive-ticks code. */