[PATCH v2 1/7] perf: Move set_filter() from behind EVENT_TRACING

[Alexander Shishkin]

For instruction trace filtering, namely, for communicating filter
definitions from userspace, I'd like to re-use the SET_FILTER code
that the tracepoints are using currently.

To that end, this patch moves the relevant code from behind EVENT_TRACING
macro.

Signed-off-by: Alexander Shishkin <alexander.shish...@linux.intel.com>
---
 kernel/events/core.c | 45 ++++++++++++++++++++++-----------------------
 1 file changed, 22 insertions(+), 23 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index eabeb2aec0..aa3733fc76 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -7244,24 +7244,6 @@ static inline void perf_tp_register(void)
        perf_pmu_register(&perf_tracepoint, "tracepoint", PERF_TYPE_TRACEPOINT);
 }
 
-static int perf_event_set_filter(struct perf_event *event, void __user *arg)
-{
-       char *filter_str;
-       int ret;
-
-       if (event->attr.type != PERF_TYPE_TRACEPOINT)
-               return -EINVAL;
-
-       filter_str = strndup_user(arg, PAGE_SIZE);
-       if (IS_ERR(filter_str))
-               return PTR_ERR(filter_str);
-
-       ret = ftrace_profile_set_filter(event, event->attr.config, filter_str);
-
-       kfree(filter_str);
-       return ret;
-}
-
 static void perf_event_free_filter(struct perf_event *event)
 {
        ftrace_profile_free_filter(event);
@@ -7316,11 +7298,6 @@ static inline void perf_tp_register(void)
 {
 }
 
-static int perf_event_set_filter(struct perf_event *event, void __user *arg)
-{
-       return -ENOENT;
-}
-
 static void perf_event_free_filter(struct perf_event *event)
 {
 }
@@ -7348,6 +7325,28 @@ void perf_bp_event(struct perf_event *bp, void *data)
 }
 #endif
 
+static int perf_event_set_filter(struct perf_event *event, void __user *arg)
+{
+       char *filter_str;
+       int ret = -EINVAL;
+
+       if (event->attr.type != PERF_TYPE_TRACEPOINT ||
+           !IS_ENABLED(CONFIG_EVENT_TRACING))
+               return -EINVAL;
+
+       filter_str = strndup_user(arg, PAGE_SIZE);
+       if (IS_ERR(filter_str))
+               return PTR_ERR(filter_str);
+
+       if (IS_ENABLED(CONFIG_EVENT_TRACING) &&
+           event->attr.type == PERF_TYPE_TRACEPOINT)
+               ret = ftrace_profile_set_filter(event, event->attr.config,
+                                               filter_str);
+
+       kfree(filter_str);
+       return ret;
+}
+
 /*
  * hrtimer based swevent callback
  */
-- 
2.8.0.rc3