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authorMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>2008-11-14 17:47:37 -0500
committerIngo Molnar <mingo@elte.hu>2008-11-16 09:01:27 +0100
commit021aeb057fc48af03fe5f37d3dda366c0d97aaf3 (patch)
tree76497e8511a937dbdc734d2ff16dd429746de722 /kernel/marker.c
parentmarkers: add missing stdargs.h include, needed due to va_list usage (diff)
downloadlinux-dev-021aeb057fc48af03fe5f37d3dda366c0d97aaf3.tar.xz
linux-dev-021aeb057fc48af03fe5f37d3dda366c0d97aaf3.zip
markers: use rcu_*_sched_notrace and notrace
Make marker critical code use notrace to make sure they can be used as an ftrace callback. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/marker.c')
-rw-r--r--kernel/marker.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/kernel/marker.c b/kernel/marker.c
index de683a7799e7..22cd7bae63e0 100644
--- a/kernel/marker.c
+++ b/kernel/marker.c
@@ -81,7 +81,7 @@ struct marker_entry {
* though the function pointer change and the marker enabling are two distinct
* operations that modifies the execution flow of preemptible code.
*/
-void __mark_empty_function(void *probe_private, void *call_private,
+notrace void __mark_empty_function(void *probe_private, void *call_private,
const char *fmt, va_list *args)
{
}
@@ -97,7 +97,8 @@ EXPORT_SYMBOL_GPL(__mark_empty_function);
* need to put a full smp_rmb() in this branch. This is why we do not use
* rcu_dereference() for the pointer read.
*/
-void marker_probe_cb(const struct marker *mdata, void *call_private, ...)
+notrace void marker_probe_cb(const struct marker *mdata,
+ void *call_private, ...)
{
va_list args;
char ptype;
@@ -107,7 +108,7 @@ void marker_probe_cb(const struct marker *mdata, void *call_private, ...)
* sure the teardown of the callbacks can be done correctly when they
* are in modules and they insure RCU read coherency.
*/
- rcu_read_lock_sched();
+ rcu_read_lock_sched_notrace();
ptype = mdata->ptype;
if (likely(!ptype)) {
marker_probe_func *func;
@@ -145,7 +146,7 @@ void marker_probe_cb(const struct marker *mdata, void *call_private, ...)
va_end(args);
}
}
- rcu_read_unlock_sched();
+ rcu_read_unlock_sched_notrace();
}
EXPORT_SYMBOL_GPL(marker_probe_cb);
@@ -157,12 +158,13 @@ EXPORT_SYMBOL_GPL(marker_probe_cb);
*
* Should be connected to markers "MARK_NOARGS".
*/
-static void marker_probe_cb_noarg(const struct marker *mdata, void *call_private, ...)
+static notrace void marker_probe_cb_noarg(const struct marker *mdata,
+ void *call_private, ...)
{
va_list args; /* not initialized */
char ptype;
- rcu_read_lock_sched();
+ rcu_read_lock_sched_notrace();
ptype = mdata->ptype;
if (likely(!ptype)) {
marker_probe_func *func;
@@ -195,7 +197,7 @@ static void marker_probe_cb_noarg(const struct marker *mdata, void *call_private
multi[i].func(multi[i].probe_private, call_private,
mdata->format, &args);
}
- rcu_read_unlock_sched();
+ rcu_read_unlock_sched_notrace();
}
static void free_old_closure(struct rcu_head *head)