Commit 9c66812b authored by Linus Torvalds's avatar Linus Torvalds

Merge branch 'tracing-fixes-for-linus' of...

Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  tracing: Fix missing function_graph events when we splice_read from trace_pipe
  tracing: Fix invalid function_graph entry
  trace: stop tracer in oops_enter()
  ftrace: Only update $offset when we update $ref_func
  ftrace: Fix the conditional that updates $ref_func
  tracing: only truncate ftrace files when O_TRUNC is set
  tracing: show proper address for trace-printk format
parents b5a7c9a0 e16852cf
......@@ -301,6 +301,7 @@ int oops_may_print(void)
*/
void oops_enter(void)
{
tracing_off();
/* can't trust the integrity of the kernel anymore: */
debug_locks_off();
do_oops_enter_exit();
......
......@@ -1662,7 +1662,7 @@ ftrace_regex_open(struct inode *inode, struct file *file, int enable)
mutex_lock(&ftrace_regex_lock);
if ((file->f_mode & FMODE_WRITE) &&
!(file->f_flags & O_APPEND))
(file->f_flags & O_TRUNC))
ftrace_filter_reset(enable);
if (file->f_mode & FMODE_READ) {
......@@ -2577,7 +2577,7 @@ ftrace_graph_open(struct inode *inode, struct file *file)
mutex_lock(&graph_lock);
if ((file->f_mode & FMODE_WRITE) &&
!(file->f_flags & O_APPEND)) {
(file->f_flags & O_TRUNC)) {
ftrace_graph_count = 0;
memset(ftrace_graph_funcs, 0, sizeof(ftrace_graph_funcs));
}
......
......@@ -2031,7 +2031,7 @@ static int tracing_open(struct inode *inode, struct file *file)
/* If this file was open for write, then erase contents */
if ((file->f_mode & FMODE_WRITE) &&
!(file->f_flags & O_APPEND)) {
(file->f_flags & O_TRUNC)) {
long cpu = (long) inode->i_private;
if (cpu == TRACE_PIPE_ALL_CPU)
......@@ -3085,6 +3085,7 @@ tracing_fill_pipe_page(size_t rem, struct trace_iterator *iter)
break;
}
if (ret != TRACE_TYPE_NO_CONSUME)
trace_consume(iter);
rem -= count;
if (!find_next_entry_inc(iter)) {
......@@ -4233,7 +4234,10 @@ static void __ftrace_dump(bool disable_tracing)
iter.pos = -1;
if (find_next_entry_inc(&iter) != NULL) {
print_trace_line(&iter);
int ret;
ret = print_trace_line(&iter);
if (ret != TRACE_TYPE_NO_CONSUME)
trace_consume(&iter);
}
......
......@@ -376,7 +376,7 @@ ftrace_event_seq_open(struct inode *inode, struct file *file)
const struct seq_operations *seq_ops;
if ((file->f_mode & FMODE_WRITE) &&
!(file->f_flags & O_APPEND))
(file->f_flags & O_TRUNC))
ftrace_clear_events();
seq_ops = inode->i_private;
......
......@@ -843,9 +843,16 @@ print_graph_function(struct trace_iterator *iter)
switch (entry->type) {
case TRACE_GRAPH_ENT: {
struct ftrace_graph_ent_entry *field;
/*
* print_graph_entry() may consume the current event,
* thus @field may become invalid, so we need to save it.
* sizeof(struct ftrace_graph_ent_entry) is very small,
* it can be safely saved at the stack.
*/
struct ftrace_graph_ent_entry *field, saved;
trace_assign_type(field, entry);
return print_graph_entry(field, s, iter);
saved = *field;
return print_graph_entry(&saved, s, iter);
}
case TRACE_GRAPH_RET: {
struct ftrace_graph_ret_entry *field;
......
......@@ -176,7 +176,7 @@ static int t_show(struct seq_file *m, void *v)
const char *str = *fmt;
int i;
seq_printf(m, "0x%lx : \"", (unsigned long)fmt);
seq_printf(m, "0x%lx : \"", *(unsigned long *)fmt);
/*
* Tabs and new lines need to be converted.
......
......@@ -403,7 +403,6 @@ while (<IN>) {
# section found, now is this a start of a function?
} elsif ($read_function && /$function_regex/) {
$text_found = 1;
$offset = hex $1;
$text = $2;
# if this is either a local function or a weak function
......@@ -412,10 +411,12 @@ while (<IN>) {
if (!defined($locals{$text}) && !defined($weak{$text})) {
$ref_func = $text;
$read_function = 0;
$offset = hex $1;
} else {
# if we already have a function, and this is weak, skip it
if (!defined($ref_func) || !defined($weak{$text})) {
if (!defined($ref_func) && !defined($weak{$text})) {
$ref_func = $text;
$offset = hex $1;
}
}
} elsif ($read_headers && /$mcount_section/) {
......
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