diff options
| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2014-11-12 10:29:54 -0500 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2014-11-19 15:25:39 -0500 |
| commit | 19a7fe206232cc875a3083211e0a21c08edd756e (patch) | |
| tree | 948aba93b9f2f6681eb7cc3209b0ec87e19470d1 /kernel/trace/trace.h | |
| parent | e400a40cffa77e45c60c5431ec8757579247cae2 (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 'kernel/trace/trace.h')
| -rw-r--r-- | kernel/trace/trace.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 3376de623ea0..19418221b302 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -14,6 +14,7 @@ #include <linux/trace_seq.h> #include <linux/ftrace_event.h> #include <linux/compiler.h> +#include <linux/trace_seq.h> #ifdef CONFIG_FTRACE_SYSCALLS #include <asm/unistd.h> /* For NR_SYSCALLS */ |