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| author | Paul E. McKenney <paulmck@linux.ibm.com> | 2019-01-09 14:50:29 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.ibm.com> | 2019-03-27 13:03:48 -0700 |
| commit | 1755ecedc485e8a898ac27b90be664784ddb6b57 (patch) | |
| tree | 540f6628246b3501eec701b6908067a9ea45ac4e /Documentation/kprobes.txt | |
| parent | 9e98c678c2d6ae3a17cb2de55d17f69dddaa231b (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.txt | 6 |
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]_. |