Messages in this thread Patch in this message | | | Date | Fri, 14 May 2010 15:22:48 -0400 | From | Steven Rostedt <> | Subject | [PATCH 02/13 v3] tracepoints: Add check trace callback type |
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From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
This check is meant to be used by tracepoint users which do a direct cast of callbacks to (void *) for direct registration, thus bypassing the register_trace_##name and unregister_trace_##name checks.
This permits to ensure that the callback type matches the function type at the call site, but without generating any code.
Acked-by: Masami Hiramatsu <mhiramat@redhat.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> LKML-Reference: <20100430165959.GA25605@Krystal> CC: Ingo Molnar <mingo@elte.hu> CC: Andrew Morton <akpm@linux-foundation.org> CC: Thomas Gleixner <tglx@linutronix.de> CC: Peter Zijlstra <peterz@infradead.org> CC: Arnaldo Carvalho de Melo <acme@redhat.com> CC: Lai Jiangshan <laijs@cn.fujitsu.com> CC: Li Zefan <lizf@cn.fujitsu.com> CC: Christoph Hellwig <hch@lst.de> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> --- include/linux/tracepoint.h | 7 ++++++- 1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h index 1d85f9a..8d5e4f6 100644 --- a/include/linux/tracepoint.h +++ b/include/linux/tracepoint.h @@ -137,9 +137,11 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin, static inline int unregister_trace_##name(void (*probe)(proto)) \ { \ return tracepoint_probe_unregister(#name, (void *)probe);\ + } \ + static inline void check_trace_callback_type_##name(void (*cb)(proto)) \ + { \ } - #define DEFINE_TRACE_FN(name, reg, unreg) \ static const char __tpstrtab_##name[] \ __attribute__((section("__tracepoints_strings"))) = #name; \ @@ -168,6 +170,9 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin, static inline int unregister_trace_##name(void (*probe)(proto)) \ { \ return -ENOSYS; \ + } \ + static inline void check_trace_callback_type_##name(void (*cb)(proto)) \ + { \ } #define DEFINE_TRACE_FN(name, reg, unreg) -- 1.7.0
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