perf, trace: Optimize tracepoints by using per-tracepoint-per-cpu hlist to track...

[net-next-2.6.git] / include / trace / ftrace.h

diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 16253db38d73274e329a20519023b342db7e7bd1..4eb2148f13216b0d06c15b28891a76460812fbef 100644 (file)
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -768,7 +768,7 @@ perf_trace_templ_##call(struct ftrace_event_call *event_call,               \
        struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
        struct ftrace_raw_##call *entry;                                \
        u64 __addr = 0, __count = 1;                                    \
-       unsigned long irq_flags;                                        \
+       struct hlist_head *head;                                        \
        int __entry_size;                                               \
        int __data_size;                                                \
        int rctx;                                                       \
@@ -781,16 +781,19 @@ perf_trace_templ_##call(struct ftrace_event_call *event_call,             \
        if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE,               \
                      "profile buffer not large enough"))               \
                return;                                                 \
+                                                                       \
        entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare(     \
-               __entry_size, event_call->id, &rctx, &irq_flags);       \
+               __entry_size, event_call->id, __regs, &rctx);           \
        if (!entry)                                                     \
                return;                                                 \
+                                                                       \
        tstruct                                                         \
                                                                        \
        { assign; }                                                     \
                                                                        \
+       head = per_cpu_ptr(event_call->perf_events, smp_processor_id());\
        perf_trace_buf_submit(entry, __entry_size, rctx, __addr,        \
-                              __count, irq_flags, __regs);             \
+               __count, __regs, head);                                 \
 }
 
 #undef DEFINE_EVENT
@@ -798,13 +801,10 @@ perf_trace_templ_##call(struct ftrace_event_call *event_call,             \
 static notrace void perf_trace_##call(proto)                           \
 {                                                                      \
        struct ftrace_event_call *event_call = &event_##call;           \
-       struct pt_regs *__regs = &get_cpu_var(perf_trace_regs);         \
-                                                                       \
-       perf_fetch_caller_regs(__regs, 1);                              \
-                                                                       \
-       perf_trace_templ_##template(event_call, __regs, args);          \
+       struct pt_regs __regs;                                          \
                                                                        \
-       put_cpu_var(perf_trace_regs);                                   \
+       perf_fetch_caller_regs(&__regs, 1);                             \
+       perf_trace_templ_##template(event_call, &__regs, args);         \
 }
 
 #undef DEFINE_EVENT_PRINT