Merge branch 'linus' into perfcounters/core-v2

Merge reason: we have gathered quite a few conflicts, need to merge upstream

Conflicts:
	arch/powerpc/kernel/Makefile
	arch/x86/ia32/ia32entry.S
	arch/x86/include/asm/hardirq.h
	arch/x86/include/asm/unistd_32.h
	arch/x86/include/asm/unistd_64.h
	arch/x86/kernel/cpu/common.c
	arch/x86/kernel/irq.c
	arch/x86/kernel/syscall_table_32.S
	arch/x86/mm/iomap_32.c
	include/linux/sched.h
	kernel/Makefile

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 14 insertions, 22 deletions

diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
index 366c8c333e13..7a30fc4c3642 100644
--- a/kernel/trace/trace_boot.c
+++ b/kernel/trace/trace_boot.c
@@ -11,6 +11,7 @@
 #include <linux/kallsyms.h>
 
 #include "trace.h"
+#include "trace_output.h"
 
 static struct trace_array *boot_trace;
 static bool pre_initcalls_finished;
@@ -27,13 +28,13 @@ void start_boot_trace(void)
 
 void enable_boot_trace(void)
 {
-	if (pre_initcalls_finished)
+	if (boot_trace && pre_initcalls_finished)
 		tracing_start_sched_switch_record();
 }
 
 void disable_boot_trace(void)
 {
-	if (pre_initcalls_finished)
+	if (boot_trace && pre_initcalls_finished)
 		tracing_stop_sched_switch_record();
 }
 
@@ -42,6 +43,9 @@ static int boot_trace_init(struct trace_array *tr)
 	int cpu;
 	boot_trace = tr;
 
+	if (!tr)
+		return 0;
+
 	for_each_cpu(cpu, cpu_possible_mask)
 		tracing_reset(tr, cpu);
 
@@ -128,10 +132,9 @@ void trace_boot_call(struct boot_trace_call *bt, initcall_t fn)
 {
 	struct ring_buffer_event *event;
 	struct trace_boot_call *entry;
-	unsigned long irq_flags;
 	struct trace_array *tr = boot_trace;
 
-	if (!pre_initcalls_finished)
+	if (!tr || !pre_initcalls_finished)
 		return;
 
 	/* Get its name now since this function could
@@ -140,18 +143,13 @@ void trace_boot_call(struct boot_trace_call *bt, initcall_t fn)
 	sprint_symbol(bt->func, (unsigned long)fn);
 	preempt_disable();
 
-	event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
-					 &irq_flags);
+	event = trace_buffer_lock_reserve(tr, TRACE_BOOT_CALL,
+					  sizeof(*entry), 0, 0);
 	if (!event)
 		goto out;
 	entry	= ring_buffer_event_data(event);
-	tracing_generic_entry_update(&entry->ent, 0, 0);
-	entry->ent.type = TRACE_BOOT_CALL;
 	entry->boot_call = *bt;
-	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
-
-	trace_wake_up();
-
+	trace_buffer_unlock_commit(tr, event, 0, 0);
  out:
 	preempt_enable();
 }
@@ -160,27 +158,21 @@ void trace_boot_ret(struct boot_trace_ret *bt, initcall_t fn)
 {
 	struct ring_buffer_event *event;
 	struct trace_boot_ret *entry;
-	unsigned long irq_flags;
 	struct trace_array *tr = boot_trace;
 
-	if (!pre_initcalls_finished)
+	if (!tr || !pre_initcalls_finished)
 		return;
 
 	sprint_symbol(bt->func, (unsigned long)fn);
 	preempt_disable();
 
-	event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
-					 &irq_flags);
+	event = trace_buffer_lock_reserve(tr, TRACE_BOOT_RET,
+					  sizeof(*entry), 0, 0);
 	if (!event)
 		goto out;
 	entry	= ring_buffer_event_data(event);
-	tracing_generic_entry_update(&entry->ent, 0, 0);
-	entry->ent.type = TRACE_BOOT_RET;
 	entry->boot_ret = *bt;
-	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
-
-	trace_wake_up();
-
+	trace_buffer_unlock_commit(tr, event, 0, 0);
  out:
 	preempt_enable();
 }