path: root/include/trace
diff options
authorSteven Rostedt (Red Hat) <rostedt@goodmis.org>2014-11-12 10:29:54 -0500
committerSteven Rostedt <rostedt@goodmis.org>2014-11-19 15:25:39 -0500
commit19a7fe206232cc875a3083211e0a21c08edd756e (patch)
tree948aba93b9f2f6681eb7cc3209b0ec87e19470d1 /include/trace
parente400a40cffa77e45c60c5431ec8757579247cae2 (diff)
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')
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) \
+ trace_seq_printf(s, print); \
+ return trace_handle_return(s); \
} \
static struct trace_event_functions ftrace_event_type_funcs_##call = { \
.trace = ftrace_raw_output_##call, \

Privacy Policy