Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (35 commits)
  perf: Fix unexported generic perf_arch_fetch_caller_regs
  perf record: Don't try to find buildids in a zero sized file
  perf: export perf_trace_regs and perf_arch_fetch_caller_regs
  perf, x86: Fix hw_perf_enable() event assignment
  perf, ppc: Fix compile error due to new cpu notifiers
  perf: Make the install relative to DESTDIR if specified
  kprobes: Calculate the index correctly when freeing the out-of-line execution slot
  perf tools: Fix sparse CPU numbering related bugs
  perf_event: Fix oops triggered by cpu offline/online
  perf: Drop the obsolete profile naming for trace events
  perf: Take a hot regs snapshot for trace events
  perf: Introduce new perf_fetch_caller_regs() for hot regs snapshot
  perf/x86-64: Use frame pointer to walk on irq and process stacks
  lockdep: Move lock events under lockdep recursion protection
  perf report: Print the map table just after samples for which no map was found
  perf report: Add multiple event support
  perf session: Change perf_session post processing functions to take histogram tree
  perf session: Add storage for seperating event types in report
  perf session: Change add_hist_entry to take the tree root instead of session
  perf record: Add ID and to recorded event data when recording multiple events
  ...

5 files changed, 80 insertions, 75 deletions

diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
index d00c6fe..78edc64 100644
--- a/kernel/trace/Makefile
+++ b/kernel/trace/Makefile
@@ -52,7 +52,7 @@ obj-$(CONFIG_EVENT_TRACING) += trace_events.o
 obj-$(CONFIG_EVENT_TRACING) += trace_export.o
 obj-$(CONFIG_FTRACE_SYSCALLS) += trace_syscalls.o
 ifeq ($(CONFIG_PERF_EVENTS),y)
-obj-$(CONFIG_EVENT_TRACING) += trace_event_profile.o
+obj-$(CONFIG_EVENT_TRACING) += trace_event_perf.o
 endif
 obj-$(CONFIG_EVENT_TRACING) += trace_events_filter.o
 obj-$(CONFIG_KPROBE_EVENT) += trace_kprobe.o
diff --git a/kernel/trace/trace_event_profile.c b/kernel/trace/trace_event_perf.c
index c1cc3ab..81f691e 100644
--- a/kernel/trace/trace_event_profile.c
+++ b/kernel/trace/trace_event_perf.c
@@ -1,32 +1,36 @@
 /*
- * trace event based perf counter profiling
+ * trace event based perf event profiling/tracing
  *
  * Copyright (C) 2009 Red Hat Inc, Peter Zijlstra <pzijlstr@redhat.com>
- *
+ * Copyright (C) 2009-2010 Frederic Weisbecker <fweisbec@gmail.com>
  */
 
 #include <linux/module.h>
 #include <linux/kprobes.h>
 #include "trace.h"
 
+DEFINE_PER_CPU(struct pt_regs, perf_trace_regs);
+EXPORT_PER_CPU_SYMBOL_GPL(perf_trace_regs);
+
+EXPORT_SYMBOL_GPL(perf_arch_fetch_caller_regs);
 
 static char *perf_trace_buf;
 static char *perf_trace_buf_nmi;
 
-typedef typeof(char [FTRACE_MAX_PROFILE_SIZE]) perf_trace_t ;
+typedef typeof(char [PERF_MAX_TRACE_SIZE]) perf_trace_t ;
 
 /* Count the events in use (per event id, not per instance) */
-static int	total_profile_count;
+static int	total_ref_count;
 
-static int ftrace_profile_enable_event(struct ftrace_event_call *event)
+static int perf_trace_event_enable(struct ftrace_event_call *event)
 {
 	char *buf;
 	int ret = -ENOMEM;
 
-	if (event->profile_count++ > 0)
+	if (event->perf_refcount++ > 0)
 		return 0;
 
-	if (!total_profile_count) {
+	if (!total_ref_count) {
 		buf = (char *)alloc_percpu(perf_trace_t);
 		if (!buf)
 			goto fail_buf;
@@ -40,35 +44,35 @@ static int ftrace_profile_enable_event(struct ftrace_event_call *event)
 		rcu_assign_pointer(perf_trace_buf_nmi, buf);
 	}
 
-	ret = event->profile_enable(event);
+	ret = event->perf_event_enable(event);
 	if (!ret) {
-		total_profile_count++;
+		total_ref_count++;
 		return 0;
 	}
 
 fail_buf_nmi:
-	if (!total_profile_count) {
+	if (!total_ref_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--;
+	event->perf_refcount--;
 
 	return ret;
 }
 
-int ftrace_profile_enable(int event_id)
+int perf_trace_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 &&
+		if (event->id == event_id && event->perf_event_enable &&
 		    try_module_get(event->mod)) {
-			ret = ftrace_profile_enable_event(event);
+			ret = perf_trace_event_enable(event);
 			break;
 		}
 	}
@@ -77,16 +81,16 @@ int ftrace_profile_enable(int event_id)
 	return ret;
 }
 
-static void ftrace_profile_disable_event(struct ftrace_event_call *event)
+static void perf_trace_event_disable(struct ftrace_event_call *event)
 {
 	char *buf, *nmi_buf;
 
-	if (--event->profile_count > 0)
+	if (--event->perf_refcount > 0)
 		return;
 
-	event->profile_disable(event);
+	event->perf_event_disable(event);
 
-	if (!--total_profile_count) {
+	if (!--total_ref_count) {
 		buf = perf_trace_buf;
 		rcu_assign_pointer(perf_trace_buf, NULL);
 
@@ -104,14 +108,14 @@ static void ftrace_profile_disable_event(struct ftrace_event_call *event)
 	}
 }
 
-void ftrace_profile_disable(int event_id)
+void perf_trace_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);
+			perf_trace_event_disable(event);
 			module_put(event->mod);
 			break;
 		}
@@ -119,8 +123,8 @@ void ftrace_profile_disable(int event_id)
 	mutex_unlock(&event_mutex);
 }
 
-__kprobes void *ftrace_perf_buf_prepare(int size, unsigned short type,
-					int *rctxp, unsigned long *irq_flags)
+__kprobes void *perf_trace_buf_prepare(int size, unsigned short type,
+				       int *rctxp, unsigned long *irq_flags)
 {
 	struct trace_entry *entry;
 	char *trace_buf, *raw_data;
@@ -161,4 +165,4 @@ err_recursion:
 	local_irq_restore(*irq_flags);
 	return NULL;
 }
-EXPORT_SYMBOL_GPL(ftrace_perf_buf_prepare);
+EXPORT_SYMBOL_GPL(perf_trace_buf_prepare);
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 3f972ad9..beab8bf 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -938,7 +938,7 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
 		trace_create_file("enable", 0644, call->dir, call,
 				  enable);
 
-	if (call->id && call->profile_enable)
+	if (call->id && call->perf_event_enable)
 		trace_create_file("id", 0444, call->dir, call,
 		 		  id);
 
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 505c922..1251e36 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1214,7 +1214,7 @@ static int set_print_fmt(struct trace_probe *tp)
 #ifdef CONFIG_PERF_EVENTS
 
 /* Kprobe profile handler */
-static __kprobes void kprobe_profile_func(struct kprobe *kp,
+static __kprobes void kprobe_perf_func(struct kprobe *kp,
 					 struct pt_regs *regs)
 {
 	struct trace_probe *tp = container_of(kp, struct trace_probe, rp.kp);
@@ -1227,11 +1227,11 @@ static __kprobes void kprobe_profile_func(struct kprobe *kp,
 	__size = SIZEOF_KPROBE_TRACE_ENTRY(tp->nr_args);
 	size = ALIGN(__size + sizeof(u32), sizeof(u64));
 	size -= sizeof(u32);
-	if (WARN_ONCE(size > FTRACE_MAX_PROFILE_SIZE,
+	if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE,
 		     "profile buffer not large enough"))
 		return;
 
-	entry = ftrace_perf_buf_prepare(size, call->id, &rctx, &irq_flags);
+	entry = perf_trace_buf_prepare(size, call->id, &rctx, &irq_flags);
 	if (!entry)
 		return;
 
@@ -1240,11 +1240,11 @@ static __kprobes void kprobe_profile_func(struct kprobe *kp,
 	for (i = 0; i < tp->nr_args; i++)
 		entry->args[i] = call_fetch(&tp->args[i].fetch, regs);
 
-	ftrace_perf_buf_submit(entry, size, rctx, entry->ip, 1, irq_flags);
+	perf_trace_buf_submit(entry, size, rctx, entry->ip, 1, irq_flags, regs);
 }
 
 /* Kretprobe profile handler */
-static __kprobes void kretprobe_profile_func(struct kretprobe_instance *ri,
+static __kprobes void kretprobe_perf_func(struct kretprobe_instance *ri,
 					    struct pt_regs *regs)
 {
 	struct trace_probe *tp = container_of(ri->rp, struct trace_probe, rp);
@@ -1257,11 +1257,11 @@ static __kprobes void kretprobe_profile_func(struct kretprobe_instance *ri,
 	__size = SIZEOF_KRETPROBE_TRACE_ENTRY(tp->nr_args);
 	size = ALIGN(__size + sizeof(u32), sizeof(u64));
 	size -= sizeof(u32);
-	if (WARN_ONCE(size > FTRACE_MAX_PROFILE_SIZE,
+	if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE,
 		     "profile buffer not large enough"))
 		return;
 
-	entry = ftrace_perf_buf_prepare(size, call->id, &rctx, &irq_flags);
+	entry = perf_trace_buf_prepare(size, call->id, &rctx, &irq_flags);
 	if (!entry)
 		return;
 
@@ -1271,10 +1271,11 @@ static __kprobes void kretprobe_profile_func(struct kretprobe_instance *ri,
 	for (i = 0; i < tp->nr_args; i++)
 		entry->args[i] = call_fetch(&tp->args[i].fetch, regs);
 
-	ftrace_perf_buf_submit(entry, size, rctx, entry->ret_ip, 1, irq_flags);
+	perf_trace_buf_submit(entry, size, rctx, entry->ret_ip, 1,
+			       irq_flags, regs);
 }
 
-static int probe_profile_enable(struct ftrace_event_call *call)
+static int probe_perf_enable(struct ftrace_event_call *call)
 {
 	struct trace_probe *tp = (struct trace_probe *)call->data;
 
@@ -1286,7 +1287,7 @@ static int probe_profile_enable(struct ftrace_event_call *call)
 		return enable_kprobe(&tp->rp.kp);
 }
 
-static void probe_profile_disable(struct ftrace_event_call *call)
+static void probe_perf_disable(struct ftrace_event_call *call)
 {
 	struct trace_probe *tp = (struct trace_probe *)call->data;
 
@@ -1311,7 +1312,7 @@ int kprobe_dispatcher(struct kprobe *kp, struct pt_regs *regs)
 		kprobe_trace_func(kp, regs);
 #ifdef CONFIG_PERF_EVENTS
 	if (tp->flags & TP_FLAG_PROFILE)
-		kprobe_profile_func(kp, regs);
+		kprobe_perf_func(kp, regs);
 #endif
 	return 0;	/* We don't tweek kernel, so just return 0 */
 }
@@ -1325,7 +1326,7 @@ int kretprobe_dispatcher(struct kretprobe_instance *ri, struct pt_regs *regs)
 		kretprobe_trace_func(ri, regs);
 #ifdef CONFIG_PERF_EVENTS
 	if (tp->flags & TP_FLAG_PROFILE)
-		kretprobe_profile_func(ri, regs);
+		kretprobe_perf_func(ri, regs);
 #endif
 	return 0;	/* We don't tweek kernel, so just return 0 */
 }
@@ -1358,8 +1359,8 @@ static int register_probe_event(struct trace_probe *tp)
 	call->unregfunc = probe_event_disable;
 
 #ifdef CONFIG_PERF_EVENTS
-	call->profile_enable = probe_profile_enable;
-	call->profile_disable = probe_profile_disable;
+	call->perf_event_enable = probe_perf_enable;
+	call->perf_event_disable = probe_perf_disable;
 #endif
 	call->data = tp;
 	ret = trace_add_event_call(call);
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index cba47d7..33c2a5b 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -428,12 +428,12 @@ core_initcall(init_ftrace_syscalls);
 
 #ifdef CONFIG_PERF_EVENTS
 
-static DECLARE_BITMAP(enabled_prof_enter_syscalls, NR_syscalls);
-static DECLARE_BITMAP(enabled_prof_exit_syscalls, NR_syscalls);
-static int sys_prof_refcount_enter;
-static int sys_prof_refcount_exit;
+static DECLARE_BITMAP(enabled_perf_enter_syscalls, NR_syscalls);
+static DECLARE_BITMAP(enabled_perf_exit_syscalls, NR_syscalls);
+static int sys_perf_refcount_enter;
+static int sys_perf_refcount_exit;
 
-static void prof_syscall_enter(struct pt_regs *regs, long id)
+static void perf_syscall_enter(struct pt_regs *regs, long id)
 {
 	struct syscall_metadata *sys_data;
 	struct syscall_trace_enter *rec;
@@ -443,7 +443,7 @@ static void prof_syscall_enter(struct pt_regs *regs, long id)
 	int size;
 
 	syscall_nr = syscall_get_nr(current, regs);
-	if (!test_bit(syscall_nr, enabled_prof_enter_syscalls))
+	if (!test_bit(syscall_nr, enabled_perf_enter_syscalls))
 		return;
 
 	sys_data = syscall_nr_to_meta(syscall_nr);
@@ -455,11 +455,11 @@ static void prof_syscall_enter(struct pt_regs *regs, long id)
 	size = ALIGN(size + sizeof(u32), sizeof(u64));
 	size -= sizeof(u32);
 
-	if (WARN_ONCE(size > FTRACE_MAX_PROFILE_SIZE,
-		      "profile buffer not large enough"))
+	if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE,
+		      "perf buffer not large enough"))
 		return;
 
-	rec = (struct syscall_trace_enter *)ftrace_perf_buf_prepare(size,
+	rec = (struct syscall_trace_enter *)perf_trace_buf_prepare(size,
 				sys_data->enter_event->id, &rctx, &flags);
 	if (!rec)
 		return;
@@ -467,10 +467,10 @@ static void prof_syscall_enter(struct pt_regs *regs, long id)
 	rec->nr = syscall_nr;
 	syscall_get_arguments(current, regs, 0, sys_data->nb_args,
 			       (unsigned long *)&rec->args);
-	ftrace_perf_buf_submit(rec, size, rctx, 0, 1, flags);
+	perf_trace_buf_submit(rec, size, rctx, 0, 1, flags, regs);
 }
 
-int prof_sysenter_enable(struct ftrace_event_call *call)
+int perf_sysenter_enable(struct ftrace_event_call *call)
 {
 	int ret = 0;
 	int num;
@@ -478,34 +478,34 @@ int prof_sysenter_enable(struct ftrace_event_call *call)
 	num = ((struct syscall_metadata *)call->data)->syscall_nr;
 
 	mutex_lock(&syscall_trace_lock);
-	if (!sys_prof_refcount_enter)
-		ret = register_trace_sys_enter(prof_syscall_enter);
+	if (!sys_perf_refcount_enter)
+		ret = register_trace_sys_enter(perf_syscall_enter);
 	if (ret) {
 		pr_info("event trace: Could not activate"
 				"syscall entry trace point");
 	} else {
-		set_bit(num, enabled_prof_enter_syscalls);
-		sys_prof_refcount_enter++;
+		set_bit(num, enabled_perf_enter_syscalls);
+		sys_perf_refcount_enter++;
 	}
 	mutex_unlock(&syscall_trace_lock);
 	return ret;
 }
 
-void prof_sysenter_disable(struct ftrace_event_call *call)
+void perf_sysenter_disable(struct ftrace_event_call *call)
 {
 	int num;
 
 	num = ((struct syscall_metadata *)call->data)->syscall_nr;
 
 	mutex_lock(&syscall_trace_lock);
-	sys_prof_refcount_enter--;
-	clear_bit(num, enabled_prof_enter_syscalls);
-	if (!sys_prof_refcount_enter)
-		unregister_trace_sys_enter(prof_syscall_enter);
+	sys_perf_refcount_enter--;
+	clear_bit(num, enabled_perf_enter_syscalls);
+	if (!sys_perf_refcount_enter)
+		unregister_trace_sys_enter(perf_syscall_enter);
 	mutex_unlock(&syscall_trace_lock);
 }
 
-static void prof_syscall_exit(struct pt_regs *regs, long ret)
+static void perf_syscall_exit(struct pt_regs *regs, long ret)
 {
 	struct syscall_metadata *sys_data;
 	struct syscall_trace_exit *rec;
@@ -515,7 +515,7 @@ static void prof_syscall_exit(struct pt_regs *regs, long ret)
 	int size;
 
 	syscall_nr = syscall_get_nr(current, regs);
-	if (!test_bit(syscall_nr, enabled_prof_exit_syscalls))
+	if (!test_bit(syscall_nr, enabled_perf_exit_syscalls))
 		return;
 
 	sys_data = syscall_nr_to_meta(syscall_nr);
@@ -530,11 +530,11 @@ static void prof_syscall_exit(struct pt_regs *regs, long ret)
 	 * Impossible, but be paranoid with the future
 	 * How to put this check outside runtime?
 	 */
-	if (WARN_ONCE(size > FTRACE_MAX_PROFILE_SIZE,
-		"exit event has grown above profile buffer size"))
+	if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE,
+		"exit event has grown above perf buffer size"))
 		return;
 
-	rec = (struct syscall_trace_exit *)ftrace_perf_buf_prepare(size,
+	rec = (struct syscall_trace_exit *)perf_trace_buf_prepare(size,
 				sys_data->exit_event->id, &rctx, &flags);
 	if (!rec)
 		return;
@@ -542,10 +542,10 @@ static void prof_syscall_exit(struct pt_regs *regs, long ret)
 	rec->nr = syscall_nr;
 	rec->ret = syscall_get_return_value(current, regs);
 
-	ftrace_perf_buf_submit(rec, size, rctx, 0, 1, flags);
+	perf_trace_buf_submit(rec, size, rctx, 0, 1, flags, regs);
 }
 
-int prof_sysexit_enable(struct ftrace_event_call *call)
+int perf_sysexit_enable(struct ftrace_event_call *call)
 {
 	int ret = 0;
 	int num;
@@ -553,30 +553,30 @@ int prof_sysexit_enable(struct ftrace_event_call *call)
 	num = ((struct syscall_metadata *)call->data)->syscall_nr;
 
 	mutex_lock(&syscall_trace_lock);
-	if (!sys_prof_refcount_exit)
-		ret = register_trace_sys_exit(prof_syscall_exit);
+	if (!sys_perf_refcount_exit)
+		ret = register_trace_sys_exit(perf_syscall_exit);
 	if (ret) {
 		pr_info("event trace: Could not activate"
 				"syscall exit trace point");
 	} else {
-		set_bit(num, enabled_prof_exit_syscalls);
-		sys_prof_refcount_exit++;
+		set_bit(num, enabled_perf_exit_syscalls);
+		sys_perf_refcount_exit++;
 	}
 	mutex_unlock(&syscall_trace_lock);
 	return ret;
 }
 
-void prof_sysexit_disable(struct ftrace_event_call *call)
+void perf_sysexit_disable(struct ftrace_event_call *call)
 {
 	int num;
 
 	num = ((struct syscall_metadata *)call->data)->syscall_nr;
 
 	mutex_lock(&syscall_trace_lock);
-	sys_prof_refcount_exit--;
-	clear_bit(num, enabled_prof_exit_syscalls);
-	if (!sys_prof_refcount_exit)
-		unregister_trace_sys_exit(prof_syscall_exit);
+	sys_perf_refcount_exit--;
+	clear_bit(num, enabled_perf_exit_syscalls);
+	if (!sys_perf_refcount_exit)
+		unregister_trace_sys_exit(perf_syscall_exit);
 	mutex_unlock(&syscall_trace_lock);
 }