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| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2014-11-12 18:29:54 +0300 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2014-11-19 23:25:39 +0300 |
| commit | 19a7fe206232cc875a3083211e0a21c08edd756e (patch) | |
| tree | 948aba93b9f2f6681eb7cc3209b0ec87e19470d1 /include/trace | |
| parent | e400a40cffa77e45c60c5431ec8757579247cae2 (diff) | |
| download | linux-19a7fe206232cc875a3083211e0a21c08edd756e.tar.xz | |
tracing: Add trace_seq_has_overflowed() and trace_handle_return()
Adding a trace_seq_has_overflowed() which returns true if the trace_seq
had too much written into it allows us to simplify the code.
Instead of checking the return value of every call to trace_seq_printf()
and friends, they can all be called normally, and at the end we can
return !trace_seq_has_overflowed() instead.
Several functions also return TRACE_TYPE_PARTIAL_LINE when the trace_seq
overflowed and TRACE_TYPE_HANDLED otherwise. Another helper function
was created called trace_handle_return() which takes a trace_seq and
returns these enums. Using this helper function also simplifies the
code.
This change also makes it possible to remove the return values of
trace_seq_printf() and friends. They should instead just be
void functions.
Link: http://lkml.kernel.org/r/20141114011410.365183157@goodmis.org
Reviewed-by: Petr Mladek <pmladek@suse.cz>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/ftrace.h | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index 26b4f2e13275..f13471b5d27a 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h @@ -280,11 +280,9 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ if (ret) \ return ret; \ \ - ret = trace_seq_printf(s, print); \ - if (!ret) \ - return TRACE_TYPE_PARTIAL_LINE; \ + trace_seq_printf(s, print); \ \ - return TRACE_TYPE_HANDLED; \ + return trace_handle_return(s); \ } \ static struct trace_event_functions ftrace_event_type_funcs_##call = { \ .trace = ftrace_raw_output_##call, \ |