Merge remote branch 'tip/perf/core'

Signed-off-by: Avi Kivity <avi@redhat.com>

arch/x86/kernel/cpu/perf_event.c

@@ -1752,23 +1752,31 @@ void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int ski
 unsigned long perf_instruction_pointer(struct pt_regs *regs)
 {
 	unsigned long ip;
+
 	if (perf_guest_cbs && perf_guest_cbs->is_in_guest())
 		ip = perf_guest_cbs->get_guest_ip();
 	else
 		ip = instruction_pointer(regs);
+
 	return ip;
 }
 
 unsigned long perf_misc_flags(struct pt_regs *regs)
 {
 	int misc = 0;
+
 	if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) {
-		misc |= perf_guest_cbs->is_user_mode() ?
-			PERF_RECORD_MISC_GUEST_USER :
-			PERF_RECORD_MISC_GUEST_KERNEL;
-	} else
-		misc |= user_mode(regs) ? PERF_RECORD_MISC_USER :
-			PERF_RECORD_MISC_KERNEL;
+		if (perf_guest_cbs->is_user_mode())
+			misc |= PERF_RECORD_MISC_GUEST_USER;
+		else
+			misc |= PERF_RECORD_MISC_GUEST_KERNEL;
+	} else {
+		if (user_mode(regs))
+			misc |= PERF_RECORD_MISC_USER;
+		else
+			misc |= PERF_RECORD_MISC_KERNEL;
+	}
+
 	if (regs->flags & PERF_EFLAGS_EXACT)
 		misc |= PERF_RECORD_MISC_EXACT;
 

arch/x86/kvm/x86.c

@@ -3965,16 +3965,20 @@ static int kvm_is_in_guest(void)
 static int kvm_is_user_mode(void)
 {
 	int user_mode = 3;
+
 	if (percpu_read(current_vcpu))
 		user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu));
+
 	return user_mode != 0;
 }
 
 static unsigned long kvm_get_guest_ip(void)
 {
 	unsigned long ip = 0;
+
 	if (percpu_read(current_vcpu))
 		ip = kvm_rip_read(percpu_read(current_vcpu));
+
 	return ip;
 }
 

include/linux/perf_event.h

@@ -941,10 +941,8 @@ static inline void perf_event_mmap(struct vm_area_struct *vma)
 }
 
 extern struct perf_guest_info_callbacks *perf_guest_cbs;
-extern int perf_register_guest_info_callbacks(
-		struct perf_guest_info_callbacks *);
-extern int perf_unregister_guest_info_callbacks(
-		struct perf_guest_info_callbacks *);
+extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
+extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
 
 extern void perf_event_comm(struct task_struct *tsk);
 extern void perf_event_fork(struct task_struct *tsk);
@@ -1016,9 +1014,9 @@ static inline void
 perf_bp_event(struct perf_event *event, void *data)			{ }
 
 static inline int perf_register_guest_info_callbacks
-(struct perf_guest_info_callbacks *) {return 0; }
+(struct perf_guest_info_callbacks *callbacks) { return 0; }
 static inline int perf_unregister_guest_info_callbacks
-(struct perf_guest_info_callbacks *) {return 0; }
+(struct perf_guest_info_callbacks *callbacks) { return 0; }
 
 static inline void perf_event_mmap(struct vm_area_struct *vma)		{ }
 static inline void perf_event_comm(struct task_struct *tsk)		{ }

tools/perf/util/probe-event.c

@@ -1263,7 +1263,7 @@ static struct strlist *get_kprobe_trace_event_names(int fd, bool include_group)
 
 static int write_kprobe_trace_event(int fd, struct kprobe_trace_event *tev)
 {
-	int ret;
+	int ret = 0;
 	char *buf = synthesize_kprobe_trace_command(tev);
 
 	if (!buf) {