7 files changed, 68 insertions, 48 deletions

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 9be67c5e5b0f..737b0efa1a62 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3611,6 +3611,8 @@ static const char readme_msg[] =
 #ifdef CONFIG_TRACER_SNAPSHOT
         "\t\t      snapshot\n"
 #endif
+        "\t\t      dump\n"
+        "\t\t      cpudump\n"
         "\t     example: echo do_fault:traceoff > set_ftrace_filter\n"
         "\t              echo do_trap:traceoff:3 > set_ftrace_filter\n"
         "\t     The first one will disable tracing every time do_fault is hit\n"
@@ -4390,8 +4392,6 @@ static void tracing_spd_release_pipe(struct splice_pipe_desc *spd,
 
 static const struct pipe_buf_operations tracing_pipe_buf_ops = {
         .can_merge              = 0,
-        .map                    = generic_pipe_buf_map,
-        .unmap                  = generic_pipe_buf_unmap,
         .confirm                = generic_pipe_buf_confirm,
         .release                = generic_pipe_buf_release,
         .steal                  = generic_pipe_buf_steal,
@@ -4486,7 +4486,7 @@ static ssize_t tracing_splice_read_pipe(struct file *filp,
         trace_access_lock(iter->cpu_file);
 
         /* Fill as many pages as possible. */
-        for (i = 0, rem = len; i < pipe->buffers && rem; i++) {
+        for (i = 0, rem = len; i < spd.nr_pages_max && rem; i++) {
                 spd.pages[i] = alloc_page(GFP_KERNEL);
                 if (!spd.pages[i])
                         break;
@@ -5279,8 +5279,6 @@ static void buffer_pipe_buf_get(struct pipe_inode_info *pipe,
 /* Pipe buffer operations for a buffer. */
 static const struct pipe_buf_operations buffer_pipe_buf_ops = {
         .can_merge              = 0,
-        .map                    = generic_pipe_buf_map,
-        .unmap                  = generic_pipe_buf_unmap,
         .confirm                = generic_pipe_buf_confirm,
         .release                = buffer_pipe_buf_release,
         .steal                  = generic_pipe_buf_steal,
@@ -5356,7 +5354,7 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
         trace_access_lock(iter->cpu_file);
         entries = ring_buffer_entries_cpu(iter->trace_buffer->buffer, iter->cpu_file);
 
-        for (i = 0; i < pipe->buffers && len && entries; i++, len -= PAGE_SIZE) {
+        for (i = 0; i < spd.nr_pages_max && len && entries; i++, len -= PAGE_SIZE) {
                 struct page *page;
                 int r;
 
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 83a4378dc5e0..3ddfd8f62c05 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -223,24 +223,25 @@ int ftrace_event_reg(struct ftrace_event_call *call,
 {
         struct ftrace_event_file *file = data;
 
+        WARN_ON(!(call->flags & TRACE_EVENT_FL_TRACEPOINT));
         switch (type) {
         case TRACE_REG_REGISTER:
-                return tracepoint_probe_register(call->name,
+                return tracepoint_probe_register(call->tp,
                                                  call->class->probe,
                                                  file);
         case TRACE_REG_UNREGISTER:
-                tracepoint_probe_unregister(call->name,
+                tracepoint_probe_unregister(call->tp,
                                             call->class->probe,
                                             file);
                 return 0;
 
 #ifdef CONFIG_PERF_EVENTS
         case TRACE_REG_PERF_REGISTER:
-                return tracepoint_probe_register(call->name,
+                return tracepoint_probe_register(call->tp,
                                                  call->class->perf_probe,
                                                  call);
         case TRACE_REG_PERF_UNREGISTER:
-                tracepoint_probe_unregister(call->name,
+                tracepoint_probe_unregister(call->tp,
                                             call->class->perf_probe,
                                             call);
                 return 0;
@@ -352,7 +353,7 @@ static int __ftrace_event_enable_disable(struct ftrace_event_file *file,
                         if (ret) {
                                 tracing_stop_cmdline_record();
                                 pr_info("event trace: Could not enable event "
-                                        "%s\n", call->name);
+                                        "%s\n", ftrace_event_name(call));
                                 break;
                         }
                         set_bit(FTRACE_EVENT_FL_ENABLED_BIT, &file->flags);
@@ -481,27 +482,29 @@ __ftrace_set_clr_event_nolock(struct trace_array *tr, const char *match,
 {
         struct ftrace_event_file *file;
         struct ftrace_event_call *call;
+        const char *name;
         int ret = -EINVAL;
 
         list_for_each_entry(file, &tr->events, list) {
 
                 call = file->event_call;
+                name = ftrace_event_name(call);
 
-                if (!call->name || !call->class || !call->class->reg)
+                if (!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, name) != 0 &&
                     strcmp(match, call->class->system) != 0)
                         continue;
 
                 if (sub && strcmp(sub, call->class->system) != 0)
                         continue;
 
-                if (event && strcmp(event, call->name) != 0)
+                if (event && strcmp(event, name) != 0)
                         continue;
 
                 ftrace_event_enable_disable(file, set);
@@ -699,7 +702,7 @@ static int t_show(struct seq_file *m, void *v)
 
         if (strcmp(call->class->system, TRACE_SYSTEM) != 0)
                 seq_printf(m, "%s:", call->class->system);
-        seq_printf(m, "%s\n", call->name);
+        seq_printf(m, "%s\n", ftrace_event_name(call));
 
         return 0;
 }
@@ -792,7 +795,7 @@ system_enable_read(struct file *filp, char __user *ubuf, size_t cnt,
         mutex_lock(&event_mutex);
         list_for_each_entry(file, &tr->events, list) {
                 call = file->event_call;
-                if (!call->name || !call->class || !call->class->reg)
+                if (!ftrace_event_name(call) || !call->class || !call->class->reg)
                         continue;
 
                 if (system && strcmp(call->class->system, system->name) != 0)
@@ -907,7 +910,7 @@ static int f_show(struct seq_file *m, void *v)
 
         switch ((unsigned long)v) {
         case FORMAT_HEADER:
-                seq_printf(m, "name: %s\n", call->name);
+                seq_printf(m, "name: %s\n", ftrace_event_name(call));
                 seq_printf(m, "ID: %d\n", call->event.type);
                 seq_printf(m, "format:\n");
                 return 0;
@@ -1527,6 +1530,7 @@ event_create_dir(struct dentry *parent, struct ftrace_event_file *file)
         struct trace_array *tr = file->tr;
         struct list_head *head;
         struct dentry *d_events;
+        const char *name;
         int ret;
 
         /*
@@ -1540,10 +1544,11 @@ event_create_dir(struct dentry *parent, struct ftrace_event_file *file)
         } else
                 d_events = parent;
 
-        file->dir = debugfs_create_dir(call->name, d_events);
+        name = ftrace_event_name(call);
+        file->dir = debugfs_create_dir(name, d_events);
         if (!file->dir) {
                 pr_warning("Could not create debugfs '%s' directory\n",
-                           call->name);
+                           name);
                 return -1;
         }
 
@@ -1567,7 +1572,7 @@ event_create_dir(struct dentry *parent, struct ftrace_event_file *file)
                 ret = call->class->define_fields(call);
                 if (ret < 0) {
                         pr_warning("Could not initialize trace point"
-                                   " events/%s\n", call->name);
+                                   " events/%s\n", name);
                         return -1;
                 }
         }
@@ -1631,15 +1636,17 @@ static void event_remove(struct ftrace_event_call *call)
 static int event_init(struct ftrace_event_call *call)
 {
         int ret = 0;
+        const char *name;
 
-        if (WARN_ON(!call->name))
+        name = ftrace_event_name(call);
+        if (WARN_ON(!name))
                 return -EINVAL;
 
         if (call->class->raw_init) {
                 ret = call->class->raw_init(call);
                 if (ret < 0 && ret != -ENOSYS)
                         pr_warn("Could not initialize trace events/%s\n",
-                                call->name);
+                                name);
         }
 
         return ret;
@@ -1885,7 +1892,7 @@ __trace_add_event_dirs(struct trace_array *tr)
                 ret = __trace_add_new_event(call, tr);
                 if (ret < 0)
                         pr_warning("Could not create directory for event %s\n",
-                                   call->name);
+                                   ftrace_event_name(call));
         }
 }
 
@@ -1894,18 +1901,20 @@ find_event_file(struct trace_array *tr, const char *system,  const char *event)
 {
         struct ftrace_event_file *file;
         struct ftrace_event_call *call;
+        const char *name;
 
         list_for_each_entry(file, &tr->events, list) {
 
                 call = file->event_call;
+                name = ftrace_event_name(call);
 
-                if (!call->name || !call->class || !call->class->reg)
+                if (!name || !call->class || !call->class->reg)
                         continue;
 
                 if (call->flags & TRACE_EVENT_FL_IGNORE_ENABLE)
                         continue;
 
-                if (strcmp(event, call->name) == 0 &&
+                if (strcmp(event, name) == 0 &&
                     strcmp(system, call->class->system) == 0)
                         return file;
         }
@@ -1973,7 +1982,7 @@ event_enable_print(struct seq_file *m, unsigned long ip,
         seq_printf(m, "%s:%s:%s",
                    data->enable ? ENABLE_EVENT_STR : DISABLE_EVENT_STR,
                    data->file->event_call->class->system,
-                   data->file->event_call->name);
+                   ftrace_event_name(data->file->event_call));
 
         if (data->count == -1)
                 seq_printf(m, ":unlimited\n");
@@ -2193,7 +2202,7 @@ __trace_early_add_event_dirs(struct trace_array *tr)
                 ret = event_create_dir(tr->event_dir, file);
                 if (ret < 0)
                         pr_warning("Could not create directory for event %s\n",
-                                   file->event_call->name);
+                                   ftrace_event_name(file->event_call));
         }
 }
 
@@ -2217,7 +2226,7 @@ __trace_early_add_events(struct trace_array *tr)
                 ret = __trace_early_add_new_event(call, tr);
                 if (ret < 0)
                         pr_warning("Could not create early event %s\n",
-                                   call->name);
+                                   ftrace_event_name(call));
         }
 }
 
@@ -2549,7 +2558,7 @@ static __init void event_trace_self_tests(void)
                         continue;
 #endif
 
-                pr_info("Testing event %s: ", call->name);
+                pr_info("Testing event %s: ", ftrace_event_name(call));
 
                 /*
                  * If an event is already enabled, someone is using
diff --git a/kernel/trace/trace_events_trigger.c b/kernel/trace/trace_events_trigger.c
index 8efbb69b04f0..925f537f07d1 100644
--- a/kernel/trace/trace_events_trigger.c
+++ b/kernel/trace/trace_events_trigger.c
@@ -1095,7 +1095,7 @@ event_enable_trigger_print(struct seq_file *m, struct event_trigger_ops *ops,
         seq_printf(m, "%s:%s:%s",
                    enable_data->enable ? ENABLE_EVENT_STR : DISABLE_EVENT_STR,
                    enable_data->file->event_call->class->system,
-                   enable_data->file->event_call->name);
+                   ftrace_event_name(enable_data->file->event_call));
 
         if (data->count == -1)
                 seq_puts(m, ":unlimited");
diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
index ee0a5098ac43..d4ddde28a81a 100644
--- a/kernel/trace/trace_export.c
+++ b/kernel/trace/trace_export.c
@@ -173,9 +173,11 @@ struct ftrace_event_class __refdata event_class_ftrace_##call = {	\
 };                                                                      \
                                                                         \
 struct ftrace_event_call __used event_##call = {                        \
-        .name                   = #call,                                \
-        .event.type             = etype,                                \
         .class                  = &event_class_ftrace_##call,           \
+        {                                                               \
+                .name                   = #call,                        \
+        },                                                              \
+        .event.type             = etype,                                \
         .print_fmt              = print,                                \
         .flags                  = TRACE_EVENT_FL_IGNORE_ENABLE | TRACE_EVENT_FL_USE_CALL_FILTER, \
 };                                                                      \
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index d021d21dd150..903ae28962be 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -341,7 +341,7 @@ static struct trace_kprobe *find_trace_kprobe(const char *event,
         struct trace_kprobe *tk;
 
         list_for_each_entry(tk, &probe_list, list)
-                if (strcmp(tk->tp.call.name, event) == 0 &&
+                if (strcmp(ftrace_event_name(&tk->tp.call), event) == 0 &&
                     strcmp(tk->tp.call.class->system, group) == 0)
                         return tk;
         return NULL;
@@ -516,7 +516,8 @@ static int register_trace_kprobe(struct trace_kprobe *tk)
         mutex_lock(&probe_lock);
 
         /* Delete old (same name) event if exist */
-        old_tk = find_trace_kprobe(tk->tp.call.name, tk->tp.call.class->system);
+        old_tk = find_trace_kprobe(ftrace_event_name(&tk->tp.call),
+                        tk->tp.call.class->system);
         if (old_tk) {
                 ret = unregister_trace_kprobe(old_tk);
                 if (ret < 0)
@@ -564,7 +565,8 @@ static int trace_kprobe_module_callback(struct notifier_block *nb,
                         if (ret)
                                 pr_warning("Failed to re-register probe %s on"
                                            "%s: %d\n",
-                                           tk->tp.call.name, mod->name, ret);
+                                           ftrace_event_name(&tk->tp.call),
+                                           mod->name, ret);
                 }
         }
         mutex_unlock(&probe_lock);
@@ -818,7 +820,8 @@ static int probes_seq_show(struct seq_file *m, void *v)
         int i;
 
         seq_printf(m, "%c", trace_kprobe_is_return(tk) ? 'r' : 'p');
-        seq_printf(m, ":%s/%s", tk->tp.call.class->system, tk->tp.call.name);
+        seq_printf(m, ":%s/%s", tk->tp.call.class->system,
+                        ftrace_event_name(&tk->tp.call));
 
         if (!tk->symbol)
                 seq_printf(m, " 0x%p", tk->rp.kp.addr);
@@ -876,7 +879,8 @@ static int probes_profile_seq_show(struct seq_file *m, void *v)
 {
         struct trace_kprobe *tk = v;
 
-        seq_printf(m, "  %-44s %15lu %15lu\n", tk->tp.call.name, tk->nhit,
+        seq_printf(m, "  %-44s %15lu %15lu\n",
+                   ftrace_event_name(&tk->tp.call), tk->nhit,
                    tk->rp.kp.nmissed);
 
         return 0;
@@ -1011,7 +1015,7 @@ print_kprobe_event(struct trace_iterator *iter, int flags,
         field = (struct kprobe_trace_entry_head *)iter->ent;
         tp = container_of(event, struct trace_probe, call.event);
 
-        if (!trace_seq_printf(s, "%s: (", tp->call.name))
+        if (!trace_seq_printf(s, "%s: (", ftrace_event_name(&tp->call)))
                 goto partial;
 
         if (!seq_print_ip_sym(s, field->ip, flags | TRACE_ITER_SYM_OFFSET))
@@ -1047,7 +1051,7 @@ print_kretprobe_event(struct trace_iterator *iter, int flags,
         field = (struct kretprobe_trace_entry_head *)iter->ent;
         tp = container_of(event, struct trace_probe, call.event);
 
-        if (!trace_seq_printf(s, "%s: (", tp->call.name))
+        if (!trace_seq_printf(s, "%s: (", ftrace_event_name(&tp->call)))
                 goto partial;
 
         if (!seq_print_ip_sym(s, field->ret_ip, flags | TRACE_ITER_SYM_OFFSET))
@@ -1286,7 +1290,8 @@ static int register_kprobe_event(struct trace_kprobe *tk)
         call->data = tk;
         ret = trace_add_event_call(call);
         if (ret) {
-                pr_info("Failed to register kprobe event: %s\n", call->name);
+                pr_info("Failed to register kprobe event: %s\n",
+                        ftrace_event_name(call));
                 kfree(call->print_fmt);
                 unregister_ftrace_event(&call->event);
         }
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index ca0e79e2abaa..a436de18aa99 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -431,7 +431,7 @@ int ftrace_raw_output_prep(struct trace_iterator *iter,
         }
 
         trace_seq_init(p);
-        ret = trace_seq_printf(s, "%s: ", event->name);
+        ret = trace_seq_printf(s, "%s: ", ftrace_event_name(event));
         if (!ret)
                 return TRACE_TYPE_PARTIAL_LINE;
 
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index e4473367e7a4..930e51462dc8 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -294,7 +294,7 @@ static struct trace_uprobe *find_probe_event(const char *event, const char *grou
         struct trace_uprobe *tu;
 
         list_for_each_entry(tu, &uprobe_list, list)
-                if (strcmp(tu->tp.call.name, event) == 0 &&
+                if (strcmp(ftrace_event_name(&tu->tp.call), event) == 0 &&
                     strcmp(tu->tp.call.class->system, group) == 0)
                         return tu;
 
@@ -324,7 +324,8 @@ static int register_trace_uprobe(struct trace_uprobe *tu)
         mutex_lock(&uprobe_lock);
 
         /* register as an event */
-        old_tu = find_probe_event(tu->tp.call.name, tu->tp.call.class->system);
+        old_tu = find_probe_event(ftrace_event_name(&tu->tp.call),
+                        tu->tp.call.class->system);
         if (old_tu) {
                 /* delete old event */
                 ret = unregister_trace_uprobe(old_tu);
@@ -599,7 +600,8 @@ static int probes_seq_show(struct seq_file *m, void *v)
         char c = is_ret_probe(tu) ? 'r' : 'p';
         int i;
 
-        seq_printf(m, "%c:%s/%s", c, tu->tp.call.class->system, tu->tp.call.name);
+        seq_printf(m, "%c:%s/%s", c, tu->tp.call.class->system,
+                        ftrace_event_name(&tu->tp.call));
         seq_printf(m, " %s:0x%p", tu->filename, (void *)tu->offset);
 
         for (i = 0; i < tu->tp.nr_args; i++)
@@ -649,7 +651,8 @@ static int probes_profile_seq_show(struct seq_file *m, void *v)
 {
         struct trace_uprobe *tu = v;
 
-        seq_printf(m, "  %s %-44s %15lu\n", tu->filename, tu->tp.call.name, tu->nhit);
+        seq_printf(m, "  %s %-44s %15lu\n", tu->filename,
+                        ftrace_event_name(&tu->tp.call), tu->nhit);
         return 0;
 }
 
@@ -844,12 +847,14 @@ print_uprobe_event(struct trace_iterator *iter, int flags, struct trace_event *e
         tu = container_of(event, struct trace_uprobe, tp.call.event);
 
         if (is_ret_probe(tu)) {
-                if (!trace_seq_printf(s, "%s: (0x%lx <- 0x%lx)", tu->tp.call.name,
+                if (!trace_seq_printf(s, "%s: (0x%lx <- 0x%lx)",
+                                        ftrace_event_name(&tu->tp.call),
                                         entry->vaddr[1], entry->vaddr[0]))
                         goto partial;
                 data = DATAOF_TRACE_ENTRY(entry, true);
         } else {
-                if (!trace_seq_printf(s, "%s: (0x%lx)", tu->tp.call.name,
+                if (!trace_seq_printf(s, "%s: (0x%lx)",
+                                        ftrace_event_name(&tu->tp.call),
                                         entry->vaddr[0]))
                         goto partial;
                 data = DATAOF_TRACE_ENTRY(entry, false);
@@ -1275,7 +1280,8 @@ static int register_uprobe_event(struct trace_uprobe *tu)
         ret = trace_add_event_call(call);
 
         if (ret) {
-                pr_info("Failed to register uprobe event: %s\n", call->name);
+                pr_info("Failed to register uprobe event: %s\n",
+                        ftrace_event_name(call));
                 kfree(call->print_fmt);
                 unregister_ftrace_event(&call->event);
         }