fbdev: fix fb_compat_ioctl() deadlocks

[linux-2.6-omap-h63xx.git] / kernel / trace / trace.c

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index a610ca77155891f45d625fe2c5927cae4a3fa8dd..9f3b478f91716bdd1cc48ac6872c2a3c1412dbb8 100644 (file)
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -656,7 +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);
@@ -701,6 +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;
@@ -726,6 +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,
@@ -1082,17 +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 */
 
@@ -1101,10 +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;
 }
@@ -1115,9 +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;
 }
@@ -1244,7 +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;
@@ -1370,10 +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;
        }
@@ -1489,12 +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;
                }