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authorFrederic Weisbecker <fweisbec@gmail.com>2010-07-16 01:27:35 +0400
committerFrederic Weisbecker <fweisbec@gmail.com>2010-07-16 01:59:33 +0400
commit5d550467b9770042e9699690907babc32104a8d4 (patch)
treeeda923f5976f5d6f881719998207696147cffa41 /kernel/trace/trace_selftest.c
parent86a8c63f75a4582c44465e2bf71bc2df175cee77 (diff)
downloadlinux-5d550467b9770042e9699690907babc32104a8d4.tar.xz
tracing: Remove ksym tracer
The ksym (breakpoint) ftrace plugin has been superseded by perf tools that are much more poweful to use the cpu breakpoints. This tracer doesn't bring more feature. It has been deprecated for a while now, lets remove it. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Prasad <prasad@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_selftest.c')
-rw-r--r--kernel/trace/trace_selftest.c54
1 files changed, 0 insertions, 54 deletions
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index 250e7f9bd2f0..39a5ca4cf15b 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -17,7 +17,6 @@ static inline int trace_valid_entry(struct trace_entry *entry)
case TRACE_BRANCH:
case TRACE_GRAPH_ENT:
case TRACE_GRAPH_RET:
- case TRACE_KSYM:
return 1;
}
return 0;
@@ -755,56 +754,3 @@ trace_selftest_startup_branch(struct tracer *trace, struct trace_array *tr)
}
#endif /* CONFIG_BRANCH_TRACER */
-#ifdef CONFIG_KSYM_TRACER
-static int ksym_selftest_dummy;
-
-int
-trace_selftest_startup_ksym(struct tracer *trace, struct trace_array *tr)
-{
- unsigned long count;
- int ret;
-
- /* start the tracing */
- ret = tracer_init(trace, tr);
- if (ret) {
- warn_failed_init_tracer(trace, ret);
- return ret;
- }
-
- ksym_selftest_dummy = 0;
- /* Register the read-write tracing request */
-
- ret = process_new_ksym_entry("ksym_selftest_dummy",
- HW_BREAKPOINT_R | HW_BREAKPOINT_W,
- (unsigned long)(&ksym_selftest_dummy));
-
- if (ret < 0) {
- printk(KERN_CONT "ksym_trace read-write startup test failed\n");
- goto ret_path;
- }
- /* Perform a read and a write operation over the dummy variable to
- * trigger the tracer
- */
- if (ksym_selftest_dummy == 0)
- ksym_selftest_dummy++;
-
- /* stop the tracing. */
- tracing_stop();
- /* check the trace buffer */
- ret = trace_test_buffer(tr, &count);
- trace->reset(tr);
- tracing_start();
-
- /* read & write operations - one each is performed on the dummy variable
- * triggering two entries in the trace buffer
- */
- if (!ret && count != 2) {
- printk(KERN_CONT "Ksym tracer startup test failed");
- ret = -1;
- }
-
-ret_path:
- return ret;
-}
-#endif /* CONFIG_KSYM_TRACER */
-