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

* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  tracing: Fix trace_print_seq()
  kprobes: No need to unlock kprobe_insn_mutex
  tracing/fastboot: Document the need of initcall_debug
  trace_export: Repair missed fields
  tracing: Fix stack tracer sysctl handling

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index c0fa54b..16b5739 100644 (file)
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -237,13 +237,9 @@ static int __kprobes collect_garbage_slots(void)
 {
        struct kprobe_insn_page *kip;
        struct hlist_node *pos, *next;
-       int safety;
 
        /* Ensure no-one is preepmted on the garbages */
-       mutex_unlock(&kprobe_insn_mutex);
-       safety = check_safety();
-       mutex_lock(&kprobe_insn_mutex);
-       if (safety != 0)
+       if (check_safety())
                return -EAGAIN;
 
        hlist_for_each_entry_safe(kip, pos, next, &kprobe_insn_pages, hlist) {

diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 1551f47..019f380 100644 (file)
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -226,13 +226,13 @@ config BOOT_TRACER
          the timings of the initcalls and traces key events and the identity
          of tasks that can cause boot delays, such as context-switches.
 
-         Its aim is to be parsed by the /scripts/bootgraph.pl tool to
+         Its aim is to be parsed by the scripts/bootgraph.pl tool to
          produce pretty graphics about boot inefficiencies, giving a visual
          representation of the delays during initcalls - but the raw
          /debug/tracing/trace text output is readable too.
 
-         You must pass in ftrace=initcall to the kernel command line
-         to enable this on bootup.
+         You must pass in initcall_debug and ftrace=initcall to the kernel
+         command line to enable this on bootup.
 
 config TRACE_BRANCH_PROFILING
        bool

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index f3716bf..bce9e01 100644 (file)
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -3160,10 +3160,10 @@ ftrace_enable_sysctl(struct ctl_table *table, int write,
 
        ret  = proc_dointvec(table, write, file, buffer, lenp, ppos);
 
-       if (ret || !write || (last_ftrace_enabled == ftrace_enabled))
+       if (ret || !write || (last_ftrace_enabled == !!ftrace_enabled))
                goto out;
 
-       last_ftrace_enabled = ftrace_enabled;
+       last_ftrace_enabled = !!ftrace_enabled;
 
        if (ftrace_enabled) {
 

diff --git a/kernel/trace/trace_event_types.h b/kernel/trace/trace_event_types.h
index 5e32e37..6db005e 100644 (file)
--- a/kernel/trace/trace_event_types.h
+++ b/kernel/trace/trace_event_types.h
@@ -26,6 +26,9 @@ TRACE_EVENT_FORMAT(funcgraph_exit, TRACE_GRAPH_RET,
                   ftrace_graph_ret_entry, ignore,
        TRACE_STRUCT(
                TRACE_FIELD(unsigned long, ret.func, func)
+               TRACE_FIELD(unsigned long long, ret.calltime, calltime)
+               TRACE_FIELD(unsigned long long, ret.rettime, rettime)
+               TRACE_FIELD(unsigned long, ret.overrun, overrun)
                TRACE_FIELD(int, ret.depth, depth)
        ),
        TP_RAW_FMT("<-- %lx (%d)")

diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 7938f3a..e0c2545 100644 (file)
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -27,8 +27,7 @@ void trace_print_seq(struct seq_file *m, struct trace_seq *s)
 {
        int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len;
 
-       s->buffer[len] = 0;
-       seq_puts(m, s->buffer);
+       seq_write(m, s->buffer, len);
 
        trace_seq_init(s);
 }

diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c
index 2d7aebd..e644af9 100644 (file)
--- a/kernel/trace/trace_stack.c
+++ b/kernel/trace/trace_stack.c
@@ -326,10 +326,10 @@ stack_trace_sysctl(struct ctl_table *table, int write,
        ret = proc_dointvec(table, write, file, buffer, lenp, ppos);
 
        if (ret || !write ||
-           (last_stack_tracer_enabled == stack_tracer_enabled))
+           (last_stack_tracer_enabled == !!stack_tracer_enabled))
                goto out;
 
-       last_stack_tracer_enabled = stack_tracer_enabled;
+       last_stack_tracer_enabled = !!stack_tracer_enabled;
 
        if (stack_tracer_enabled)
                register_ftrace_function(&trace_ops);