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authorPaul E. McKenney <paulmck@linux.ibm.com>2019-01-09 14:50:29 -0800
committerPaul E. McKenney <paulmck@linux.ibm.com>2019-03-27 13:03:48 -0700
commit1755ecedc485e8a898ac27b90be664784ddb6b57 (patch)
tree540f6628246b3501eec701b6908067a9ea45ac4e /Documentation/kprobes.txt
parent9e98c678c2d6ae3a17cb2de55d17f69dddaa231b (diff)
doc/kprobes: Update obsolete RCU update functions
The RCU flavors have been consolidated, so this commit replaces mentions of the now-obsolete synchronize_sched() function with synchronize_rcu(). Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com> Cc: "Naveen N. Rao" <naveen.n.rao@linux.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jonathan Corbet <corbet@lwn.net> Cc: <linux-doc@vger.kernel.org> Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Diffstat (limited to 'Documentation/kprobes.txt')
-rw-r--r--Documentation/kprobes.txt6
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/kprobes.txt b/Documentation/kprobes.txt
index 10f4499e677c..ee60e519438a 100644
--- a/Documentation/kprobes.txt
+++ b/Documentation/kprobes.txt
@@ -243,10 +243,10 @@ Optimization
^^^^^^^^^^^^
The Kprobe-optimizer doesn't insert the jump instruction immediately;
-rather, it calls synchronize_sched() for safety first, because it's
+rather, it calls synchronize_rcu() for safety first, because it's
possible for a CPU to be interrupted in the middle of executing the
-optimized region [3]_. As you know, synchronize_sched() can ensure
-that all interruptions that were active when synchronize_sched()
+optimized region [3]_. As you know, synchronize_rcu() can ensure
+that all interruptions that were active when synchronize_rcu()
was called are done, but only if CONFIG_PREEMPT=n. So, this version
of kprobe optimization supports only kernels with CONFIG_PREEMPT=n [4]_.