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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2013-03-26 17:53:03 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@rostedt.homelinux.com> | 2013-04-08 18:24:22 +0200 |
| commit | 5000c418840b309251c5887f0b56503aae30f84c (patch) | |
| tree | dd6b37707670ac5eaaba9f395c999328904dd38b /kernel/trace | |
| parent | tracing: Fix race with update_max_tr_single and changing tracers (diff) | |
| download | linux-5000c418840b309251c5887f0b56503aae30f84c.tar.xz linux-5000c418840b309251c5887f0b56503aae30f84c.zip | |
ftrace: Consistently restore trace function on sysctl enabling
If we reenable ftrace via syctl, we currently set ftrace_trace_function
based on the previous simplistic algorithm. This is inconsistent with
what update_ftrace_function does. So better call that helper instead.
Link: http://lkml.kernel.org/r/5151D26F.1070702@siemens.com
Cc: stable@vger.kernel.org
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/ftrace.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 6893d5a2bf08..cc4943c7ce6d 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -4555,12 +4555,8 @@ ftrace_enable_sysctl(struct ctl_table *table, int write, ftrace_startup_sysctl(); /* we are starting ftrace again */ - if (ftrace_ops_list != &ftrace_list_end) { - if (ftrace_ops_list->next == &ftrace_list_end) - ftrace_trace_function = ftrace_ops_list->func; - else - ftrace_trace_function = ftrace_ops_list_func; - } + if (ftrace_ops_list != &ftrace_list_end) + update_ftrace_function(); } else { /* stopping ftrace calls (just send to ftrace_stub) */ |