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perf probe: Remove incorrect symbol check for --list 

Remove unneeded symbol check for --list option.

This code actually checks whether the given symbol exists in the kernel.
But this is incorrect for online kernel/module and offline module too:

 - For online kernel/module, the kprobes itself already
  ensured the symbol exist in the kernel.
 - For offline module, this code can't access the offlined
  modules. Ignore it.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: "David A. Long" <dave.long@linaro.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: yrl.pp-manager.tt@hitachi.com
Link: http://lkml.kernel.org/r/20140206053206.29635.7453.stgit@kbuild-fedora.yrl.intra.hitachi.co.jp
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Masami Hiramatsu 2014-02-06 05:32:06 +00:00 committed by Arnaldo Carvalho de Melo
parent ee45b6c2c5
commit f49540b17c
1 changed files with 0 additions and 8 deletions
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8
tools/perf/util/probe-event.c
View File

@ -739,14 +739,6 @@ int show_available_vars(struct perf_probe_event *pevs, int npevs,
static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp,
struct perf_probe_point *pp)
{
struct symbol *sym;
sym = __find_kernel_function_by_name(tp->symbol, NULL);
if (!sym) {
pr_err("Failed to find symbol %s in kernel.\n", tp->symbol);
return -ENOENT;
}
return convert_to_perf_probe_point(tp, pp);
}