X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=kernel%2Ftrace%2Ftrace.c;h=9f3b478f91716bdd1cc48ac6872c2a3c1412dbb8;hb=cb110171a65c5a2d85ec814d498986db611040fd;hp=d345d649d073a39d6e572b88047e726754e8da1f;hpb=f20e3b5fe7ead0615309433260b9784d8da0bbbd;p=linux-2.6-omap-h63xx.git

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index d345d649d07..9f3b478f917 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -34,6 +34,7 @@
 
 #include <linux/stacktrace.h>
 #include <linux/ring_buffer.h>
+#include <linux/irqflags.h>
 
 #include "trace.h"
 
@@ -655,7 +656,11 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags,
 	entry->preempt_count		= pc & 0xff;
 	entry->pid			= (tsk) ? tsk->pid : 0;
 	entry->flags =
+#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
 		(irqs_disabled_flags(flags) ? TRACE_FLAG_IRQS_OFF : 0) |
+#else
+		TRACE_FLAG_IRQS_NOSUPPORT |
+#endif
 		((pc & HARDIRQ_MASK) ? TRACE_FLAG_HARDIRQ : 0) |
 		((pc & SOFTIRQ_MASK) ? TRACE_FLAG_SOFTIRQ : 0) |
 		(need_resched() ? TRACE_FLAG_NEED_RESCHED : 0);
@@ -700,6 +705,7 @@ static void ftrace_trace_stack(struct trace_array *tr,
 			       unsigned long flags,
 			       int skip, int pc)
 {
+#ifdef CONFIG_STACKTRACE
 	struct ring_buffer_event *event;
 	struct stack_entry *entry;
 	struct stack_trace trace;
@@ -725,6 +731,7 @@ static void ftrace_trace_stack(struct trace_array *tr,
 
 	save_stack_trace(&trace);
 	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
+#endif
 }
 
 void __trace_stack(struct trace_array *tr,
@@ -851,7 +858,7 @@ ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3)
 	preempt_enable_notrace();
 }
 
-#ifdef CONFIG_FTRACE
+#ifdef CONFIG_FUNCTION_TRACER
 static void
 function_trace_call(unsigned long ip, unsigned long parent_ip)
 {
@@ -865,9 +872,6 @@ function_trace_call(unsigned long ip, unsigned long parent_ip)
 	if (unlikely(!ftrace_function_enabled))
 		return;
 
-	if (skip_trace(ip))
-		return;
-
 	pc = preempt_count();
 	resched = need_resched();
 	preempt_disable_notrace();
@@ -1084,17 +1088,20 @@ static void s_stop(struct seq_file *m, void *p)
 	mutex_unlock(&trace_types_lock);
 }
 
-#define KRETPROBE_MSG "[unknown/kretprobe'd]"
-
 #ifdef CONFIG_KRETPROBES
-static inline int kretprobed(unsigned long addr)
+static inline const char *kretprobed(const char *name)
 {
-	return addr == (unsigned long)kretprobe_trampoline;
+	static const char tramp_name[] = "kretprobe_trampoline";
+	int size = sizeof(tramp_name);
+
+	if (strncmp(tramp_name, name, size) == 0)
+		return "[unknown/kretprobe'd]";
+	return name;
 }
 #else
-static inline int kretprobed(unsigned long addr)
+static inline const char *kretprobed(const char *name)
 {
-	return 0;
+	return name;
 }
 #endif /* CONFIG_KRETPROBES */
 
@@ -1103,10 +1110,13 @@ seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
 {
 #ifdef CONFIG_KALLSYMS
 	char str[KSYM_SYMBOL_LEN];
+	const char *name;
 
 	kallsyms_lookup(address, NULL, NULL, NULL, str);
 
-	return trace_seq_printf(s, fmt, str);
+	name = kretprobed(str);
+
+	return trace_seq_printf(s, fmt, name);
 #endif
 	return 1;
 }
@@ -1117,9 +1127,12 @@ seq_print_sym_offset(struct trace_seq *s, const char *fmt,
 {
 #ifdef CONFIG_KALLSYMS
 	char str[KSYM_SYMBOL_LEN];
+	const char *name;
 
 	sprint_symbol(str, address);
-	return trace_seq_printf(s, fmt, str);
+	name = kretprobed(str);
+
+	return trace_seq_printf(s, fmt, name);
 #endif
 	return 1;
 }
@@ -1246,7 +1259,8 @@ lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
 	trace_seq_printf(s, "%8.8s-%-5d ", comm, entry->pid);
 	trace_seq_printf(s, "%3d", cpu);
 	trace_seq_printf(s, "%c%c",
-			(entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : '.',
+			(entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
+			 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : '.',
 			((entry->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.'));
 
 	hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
@@ -1372,10 +1386,7 @@ print_lat_fmt(struct trace_iterator *iter, unsigned int trace_idx, int cpu)
 
 		seq_print_ip_sym(s, field->ip, sym_flags);
 		trace_seq_puts(s, " (");
-		if (kretprobed(field->parent_ip))
-			trace_seq_puts(s, KRETPROBE_MSG);
-		else
-			seq_print_ip_sym(s, field->parent_ip, sym_flags);
+		seq_print_ip_sym(s, field->parent_ip, sym_flags);
 		trace_seq_puts(s, ")\n");
 		break;
 	}
@@ -1491,12 +1502,9 @@ static enum print_line_t print_trace_fmt(struct trace_iterator *iter)
 			ret = trace_seq_printf(s, " <-");
 			if (!ret)
 				return TRACE_TYPE_PARTIAL_LINE;
-			if (kretprobed(field->parent_ip))
-				ret = trace_seq_puts(s, KRETPROBE_MSG);
-			else
-				ret = seq_print_ip_sym(s,
-						       field->parent_ip,
-						       sym_flags);
+			ret = seq_print_ip_sym(s,
+					       field->parent_ip,
+					       sym_flags);
 			if (!ret)
 				return TRACE_TYPE_PARTIAL_LINE;
 		}
@@ -2379,9 +2387,10 @@ tracing_set_trace_write(struct file *filp, const char __user *ubuf,
 	int i;
 	size_t ret;
 
+	ret = cnt;
+
 	if (cnt > max_tracer_type_len)
 		cnt = max_tracer_type_len;
-	ret = cnt;
 
 	if (copy_from_user(&buf, ubuf, cnt))
 		return -EFAULT;
@@ -2414,8 +2423,8 @@ tracing_set_trace_write(struct file *filp, const char __user *ubuf,
  out:
 	mutex_unlock(&trace_types_lock);
 
-	if (ret == cnt)
-		filp->f_pos += cnt;
+	if (ret > 0)
+		filp->f_pos += ret;
 
 	return ret;
 }
@@ -3097,7 +3106,7 @@ void ftrace_dump(void)
 	dump_ran = 1;
 
 	/* No turning back! */
-	ftrace_kill_atomic();
+	ftrace_kill();
 
 	for_each_tracing_cpu(cpu) {
 		atomic_inc(&global_trace.data[cpu]->disabled);