diff options
| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2013-12-21 17:39:40 -0500 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2014-01-02 16:17:12 -0500 |
| commit | 098c879e1f2d6ee7afbfe959f6b04070065cec90 (patch) | |
| tree | 22a2d64f30c82b70619786bc541ddcbe320f5d44 /kernel/trace/trace.h | |
| parent | ac38fb8582d86ba887b5d07c0912dec135bf6931 (diff) | |
tracing: Add generic tracing_lseek() function
Trace event triggers added a lseek that uses the ftrace_filter_lseek()
function. Unfortunately, when function tracing is not configured in
that function is not defined and the kernel fails to build.
This is the second time that function was added to a file ops and
it broke the build due to requiring special config dependencies.
Make a generic tracing_lseek() that all the tracing utilities may
use.
Also, modify the old ftrace_filter_lseek() to return 0 instead of
1 on WRONLY. Not sure why it was a 1 as that does not make sense.
This also changes the old tracing_seek() to modify the file pos
pointer on WRONLY as well.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Tested-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Acked-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace.h')
| -rw-r--r-- | kernel/trace/trace.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 433bfc5dd576..0380cab0af9b 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -588,6 +588,8 @@ void tracing_start_sched_switch_record(void); int register_tracer(struct tracer *type); int is_tracing_stopped(void); +loff_t tracing_lseek(struct file *file, loff_t offset, int whence); + extern cpumask_var_t __read_mostly tracing_buffer_mask; #define for_each_tracing_cpu(cpu) \ |