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