uprobes/tracing: Kill the pointless local_save_flags/preempt_count calls
uprobe_trace_func() is never called with irqs or preemption disabled, no need to ask preempt_count() or local_save_flags(). Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Tested-by: Anton Arapov <anton@redhat.com>
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@ -492,17 +492,13 @@ static int uprobe_trace_func(struct trace_uprobe *tu, struct pt_regs *regs)
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struct ring_buffer_event *event;
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struct ring_buffer *buffer;
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u8 *data;
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int size, i, pc;
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unsigned long irq_flags;
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int size, i;
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struct ftrace_event_call *call = &tu->call;
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local_save_flags(irq_flags);
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pc = preempt_count();
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size = sizeof(*entry) + tu->size;
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event = trace_current_buffer_lock_reserve(&buffer, call->event.type,
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size, irq_flags, pc);
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size, 0, 0);
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if (!event)
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return 0;
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@ -513,7 +509,7 @@ static int uprobe_trace_func(struct trace_uprobe *tu, struct pt_regs *regs)
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call_fetch(&tu->args[i].fetch, regs, data + tu->args[i].offset);
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if (!filter_current_check_discard(buffer, call, entry, event))
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trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
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trace_buffer_unlock_commit(buffer, event, 0, 0);
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return 0;
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}
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