1 files changed, 0 insertions, 164 deletions
diff --git a/kernel/trace/trace_event_profile.c b/kernel/trace/trace_event_profile.c
deleted file mode 100644
index f0d693005075..000000000000
--- a/kernel/trace/trace_event_profile.c
+++ /dev/null
@@ -1,164 +0,0 @@
-/*
- * trace event based perf counter profiling
- *
- * Copyright (C) 2009 Red Hat Inc, Peter Zijlstra <pzijlstr@redhat.com>
- *
- */
-
-#include <linux/module.h>
-#include <linux/kprobes.h>
-#include "trace.h"
-
-
-static char *perf_trace_buf;
-static char *perf_trace_buf_nmi;
-
-typedef typeof(char [FTRACE_MAX_PROFILE_SIZE]) perf_trace_t ;
-
-/* Count the events in use (per event id, not per instance) */
-static int	total_profile_count;
-
-static int ftrace_profile_enable_event(struct ftrace_event_call *event)
-{
-	char *buf;
-	int ret = -ENOMEM;
-
-	if (event->profile_count++ > 0)
-		return 0;
-
-	if (!total_profile_count) {
-		buf = (char *)alloc_percpu(perf_trace_t);
-		if (!buf)
-			goto fail_buf;
-
-		rcu_assign_pointer(perf_trace_buf, buf);
-
-		buf = (char *)alloc_percpu(perf_trace_t);
-		if (!buf)
-			goto fail_buf_nmi;
-
-		rcu_assign_pointer(perf_trace_buf_nmi, buf);
-	}
-
-	ret = event->profile_enable(event);
-	if (!ret) {
-		total_profile_count++;
-		return 0;
-	}
-
-fail_buf_nmi:
-	if (!total_profile_count) {
-		free_percpu(perf_trace_buf_nmi);
-		free_percpu(perf_trace_buf);
-		perf_trace_buf_nmi = NULL;
-		perf_trace_buf = NULL;
-	}
-fail_buf:
-	event->profile_count--;
-
-	return ret;
-}
-
-int ftrace_profile_enable(int event_id)
-{
-	struct ftrace_event_call *event;
-	int ret = -EINVAL;
-
-	mutex_lock(&event_mutex);
-	list_for_each_entry(event, &ftrace_events, list) {
-		if (event->id == event_id && event->profile_enable &&
-		    try_module_get(event->mod)) {
-			ret = ftrace_profile_enable_event(event);
-			break;
-		}
-	}
-	mutex_unlock(&event_mutex);
-
-	return ret;
-}
-
-static void ftrace_profile_disable_event(struct ftrace_event_call *event)
-{
-	char *buf, *nmi_buf;
-
-	if (--event->profile_count > 0)
-		return;
-
-	event->profile_disable(event);
-
-	if (!--total_profile_count) {
-		buf = perf_trace_buf;
-		rcu_assign_pointer(perf_trace_buf, NULL);
-
-		nmi_buf = perf_trace_buf_nmi;
-		rcu_assign_pointer(perf_trace_buf_nmi, NULL);
-
-		/*
-		 * Ensure every events in profiling have finished before
-		 * releasing the buffers
-		 */
-		synchronize_sched();
-
-		free_percpu(buf);
-		free_percpu(nmi_buf);
-	}
-}
-
-void ftrace_profile_disable(int event_id)
-{
-	struct ftrace_event_call *event;
-
-	mutex_lock(&event_mutex);
-	list_for_each_entry(event, &ftrace_events, list) {
-		if (event->id == event_id) {
-			ftrace_profile_disable_event(event);
-			module_put(event->mod);
-			break;
-		}
-	}
-	mutex_unlock(&event_mutex);
-}
-
-__kprobes void *ftrace_perf_buf_prepare(int size, unsigned short type,
-					int *rctxp, unsigned long *irq_flags)
-{
-	struct trace_entry *entry;
-	char *trace_buf, *raw_data;
-	int pc, cpu;
-
-	pc = preempt_count();
-
-	/* Protect the per cpu buffer, begin the rcu read side */
-	local_irq_save(*irq_flags);
-
-	*rctxp = perf_swevent_get_recursion_context();
-	if (*rctxp < 0)
-		goto err_recursion;
-
-	cpu = smp_processor_id();
-
-	if (in_nmi())
-		trace_buf = rcu_dereference(perf_trace_buf_nmi);
-	else
-		trace_buf = rcu_dereference(perf_trace_buf);
-
-	if (!trace_buf)
-		goto err;
-
-	raw_data = per_cpu_ptr(trace_buf, cpu);
-
-	/* zero the dead bytes from align to not leak stack to user */
-	*(u64 *)(&raw_data[size - sizeof(u64)]) = 0ULL;
-
-	entry = (struct trace_entry *)raw_data;
-	tracing_generic_entry_update(entry, *irq_flags, pc);
-	entry->type = type;
-
-	return raw_data;
-err:
-	perf_swevent_put_recursion_context(*rctxp);
-err_recursion:
-	local_irq_restore(*irq_flags);
-	return NULL;
-}
-EXPORT_SYMBOL_GPL(ftrace_perf_buf_prepare);