perf: Avoid horrible stack usage

[sfrench/cifs-2.6.git] / include / trace / ftrace.h

diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 139b5067345b2ecb2daa1881d8b484ad76cf382a..27609dfcce25916120521b23215dd473fab0051a 100644 (file)
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -763,7 +763,7 @@ perf_trace_##call(void *__data, proto)                                      \
        struct ftrace_event_call *event_call = __data;                  \
        struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
        struct ftrace_raw_##call *entry;                                \
-       struct pt_regs __regs;                                          \
+       struct pt_regs *__regs;                                         \
        u64 __addr = 0, __count = 1;                                    \
        struct task_struct *__task = NULL;                              \
        struct hlist_head *head;                                        \
@@ -782,18 +782,19 @@ perf_trace_##call(void *__data, proto)                                    \
                             sizeof(u64));                              \
        __entry_size -= sizeof(u32);                                    \
                                                                        \
-       perf_fetch_caller_regs(&__regs);                                \
        entry = perf_trace_buf_prepare(__entry_size,                    \
                        event_call->event.type, &__regs, &rctx);        \
        if (!entry)                                                     \
                return;                                                 \
                                                                        \
+       perf_fetch_caller_regs(__regs);                                 \
+                                                                       \
        tstruct                                                         \
                                                                        \
        { assign; }                                                     \
                                                                        \
        perf_trace_buf_submit(entry, __entry_size, rctx, __addr,        \
-               __count, &__regs, head, __task);                        \
+               __count, __regs, head, __task);                         \
 }
 
 /*