[tip:core/rcu] tools/kernel.h: Replace synchronize_sched() with synchronize_rcu()

[tip-bot for Paul E. McKenney]

Commit-ID:  4a67e3a79e3bdc47dfd0c85a1888067d95a0282c
Gitweb:     https://git.kernel.org/tip/4a67e3a79e3bdc47dfd0c85a1888067d95a0282c
Author:     Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
AuthorDate: Wed, 7 Nov 2018 15:25:13 -0800
Committer:  Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
CommitDate: Sat, 1 Dec 2018 12:38:51 -0800

tools/kernel.h: Replace synchronize_sched() with synchronize_rcu()

Now that synchronize_rcu() waits for preempt-disable regions of code
as well as RCU read-side critical sections, synchronize_sched() can be
replaced by synchronize_rcu().  This commit therefore makes this change,
even though it is but a comment.

Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: <linux-kernel@xxxxxxxxxxxxxxx>
---
 tools/include/linux/kernel.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/include/linux/kernel.h b/tools/include/linux/kernel.h
index 6935ef94e77a..857d9e22826e 100644
--- a/tools/include/linux/kernel.h
+++ b/tools/include/linux/kernel.h
@@ -116,6 +116,6 @@ int scnprintf(char * buf, size_t size, const char * fmt, ...);
 #define round_down(x, y) ((x) & ~__round_mask(x, y))
 
 #define current_gfp_context(k) 0
-#define synchronize_sched()
+#define synchronize_rcu()
 
 #endif