Merge branch 'perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Fixes for perf/core:

 - Rename some perf_target methods to avoid double negation, from Namhyung Kim.
 - Revert change to use per task events with inheritance, from Namhyung Kim.
 - Events should start disabled till children starts running, from David Ahern.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

5 files changed, 17 insertions, 6 deletions

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 08a08bab57a3..33ae2f196fa3 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -4744,7 +4744,8 @@ static ssize_t
 rb_simple_read(struct file *filp, char __user *ubuf,
                size_t cnt, loff_t *ppos)
 {
-        struct ring_buffer *buffer = filp->private_data;
+        struct trace_array *tr = filp->private_data;
+        struct ring_buffer *buffer = tr->buffer;
         char buf[64];
         int r;
 
@@ -4762,7 +4763,8 @@ static ssize_t
 rb_simple_write(struct file *filp, const char __user *ubuf,
                 size_t cnt, loff_t *ppos)
 {
-        struct ring_buffer *buffer = filp->private_data;
+        struct trace_array *tr = filp->private_data;
+        struct ring_buffer *buffer = tr->buffer;
         unsigned long val;
         int ret;
 
@@ -4849,7 +4851,7 @@ static __init int tracer_init_debugfs(void)
                           &trace_clock_fops);
 
         trace_create_file("tracing_on", 0644, d_tracer,
-                            global_trace.buffer, &rb_simple_fops);
+                            &global_trace, &rb_simple_fops);
 
 #ifdef CONFIG_DYNAMIC_FTRACE
         trace_create_file("dyn_ftrace_total_info", 0444, d_tracer,
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 1c8b7c6f7b3b..6c6f7933eede 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -838,11 +838,11 @@ void trace_printk_init_buffers(void);
                      filter)
 #include "trace_entries.h"
 
-#ifdef CONFIG_FUNCTION_TRACER
+#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_FUNCTION_TRACER)
 int perf_ftrace_event_register(struct ftrace_event_call *call,
                                enum trace_reg type, void *data);
 #else
 #define perf_ftrace_event_register NULL
-#endif /* CONFIG_FUNCTION_TRACER */
+#endif
 
 #endif /* _LINUX_KERNEL_TRACE_H */
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 079a93ae8a9d..29111da1d100 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -294,6 +294,9 @@ static int __ftrace_set_clr_event(const char *match, const char *sub,
                 if (!call->name || !call->class || !call->class->reg)
                         continue;
 
+                if (call->flags & TRACE_EVENT_FL_IGNORE_ENABLE)
+                        continue;
+
                 if (match &&
                     strcmp(match, call->name) != 0 &&
                     strcmp(match, call->class->system) != 0)
@@ -1164,7 +1167,7 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
                 return -1;
         }
 
-        if (call->class->reg)
+        if (call->class->reg && !(call->flags & TRACE_EVENT_FL_IGNORE_ENABLE))
                 trace_create_file("enable", 0644, call->dir, call,
                                   enable);
 
diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
index 3dd15e8bc856..e039906b037d 100644
--- a/kernel/trace/trace_export.c
+++ b/kernel/trace/trace_export.c
@@ -180,6 +180,7 @@ struct ftrace_event_call __used event_##call = {			\
         .event.type             = etype,                                \
         .class                  = &event_class_ftrace_##call,           \
         .print_fmt              = print,                                \
+        .flags                  = TRACE_EVENT_FL_IGNORE_ENABLE,         \
 };                                                                      \
 struct ftrace_event_call __used                                         \
 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call;
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 859fae6b1825..df611a0e76c5 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -652,6 +652,8 @@ int trace_print_lat_context(struct trace_iterator *iter)
 {
         u64 next_ts;
         int ret;
+        /* trace_find_next_entry will reset ent_size */
+        int ent_size = iter->ent_size;
         struct trace_seq *s = &iter->seq;
         struct trace_entry *entry = iter->ent,
                            *next_entry = trace_find_next_entry(iter, NULL,
@@ -660,6 +662,9 @@ int trace_print_lat_context(struct trace_iterator *iter)
         unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start);
         unsigned long rel_usecs;
 
+        /* Restore the original ent_size */
+        iter->ent_size = ent_size;
+
         if (!next_entry)
                 next_ts = iter->ts;
         rel_usecs = ns2usecs(next_ts - iter->ts);