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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2010-03-25 14:51:50 +0100
committerIngo Molnar <mingo@elte.hu>2010-03-26 11:33:55 +0100
commitfaa4602e47690fb11221e00f9b9697c8dc0d4b19 (patch)
treeaf667d1cdff7dc63b6893ee3f27a1f2503229ed1 /kernel/trace/trace_selftest.c
parent7c5ecaf7666617889f337296c610815b519abfa9 (diff)
x86, perf, bts, mm: Delete the never used BTS-ptrace code
Support for the PMU's BTS features has been upstreamed in v2.6.32, but we still have the old and disabled ptrace-BTS, as Linus noticed it not so long ago. It's buggy: TIF_DEBUGCTLMSR is trampling all over that MSR without regard for other uses (perf) and doesn't provide the flexibility needed for perf either. Its users are ptrace-block-step and ptrace-bts, since ptrace-bts was never used and ptrace-block-step can be implemented using a much simpler approach. So axe all 3000 lines of it. That includes the *locked_memory*() APIs in mm/mlock.c as well. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Roland McGrath <roland@redhat.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Markus Metzger <markus.t.metzger@intel.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <20100325135413.938004390@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace_selftest.c')
-rw-r--r--kernel/trace/trace_selftest.c57
1 files changed, 0 insertions, 57 deletions
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index 280fea470d6..a7084e7c042 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -16,7 +16,6 @@ static inline int trace_valid_entry(struct trace_entry *entry)
case TRACE_BRANCH:
case TRACE_GRAPH_ENT:
case TRACE_GRAPH_RET:
- case TRACE_HW_BRANCHES:
case TRACE_KSYM:
return 1;
}
@@ -754,62 +753,6 @@ trace_selftest_startup_branch(struct tracer *trace, struct trace_array *tr)
}
#endif /* CONFIG_BRANCH_TRACER */
-#ifdef CONFIG_HW_BRANCH_TRACER
-int
-trace_selftest_startup_hw_branches(struct tracer *trace,
- struct trace_array *tr)
-{
- struct trace_iterator *iter;
- struct tracer tracer;
- unsigned long count;
- int ret;
-
- if (!trace->open) {
- printk(KERN_CONT "missing open function...");
- return -1;
- }
-
- ret = tracer_init(trace, tr);
- if (ret) {
- warn_failed_init_tracer(trace, ret);
- return ret;
- }
-
- /*
- * The hw-branch tracer needs to collect the trace from the various
- * cpu trace buffers - before tracing is stopped.
- */
- iter = kzalloc(sizeof(*iter), GFP_KERNEL);
- if (!iter)
- return -ENOMEM;
-
- memcpy(&tracer, trace, sizeof(tracer));
-
- iter->trace = &tracer;
- iter->tr = tr;
- iter->pos = -1;
- mutex_init(&iter->mutex);
-
- trace->open(iter);
-
- mutex_destroy(&iter->mutex);
- kfree(iter);
-
- tracing_stop();
-
- ret = trace_test_buffer(tr, &count);
- trace->reset(tr);
- tracing_start();
-
- if (!ret && !count) {
- printk(KERN_CONT "no entries found..");
- ret = -1;
- }
-
- return ret;
-}
-#endif /* CONFIG_HW_BRANCH_TRACER */
-
#ifdef CONFIG_KSYM_TRACER
static int ksym_selftest_dummy;