[tip:perf/core] tracepoints: Add check trace callback type
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From: tip-bot for Mathieu Desnoyers on 21 May 2010 13:20 Commit-ID: 53da59aa6dd881fd0bbdd058a8a299d90ce9dd1d Gitweb: http://git.kernel.org/tip/53da59aa6dd881fd0bbdd058a8a299d90ce9dd1d Author: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> AuthorDate: Fri, 30 Apr 2010 12:59:59 -0400 Committer: Steven Rostedt <rostedt(a)goodmis.org> CommitDate: Fri, 14 May 2010 09:34:26 -0400 tracepoints: Add check trace callback type 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(a)redhat.com> Acked-by: Frederic Weisbecker <fweisbec(a)gmail.com> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> LKML-Reference: <20100430165959.GA25605(a)Krystal> CC: Ingo Molnar <mingo(a)elte.hu> CC: Andrew Morton <akpm(a)linux-foundation.org> CC: Thomas Gleixner <tglx(a)linutronix.de> CC: Peter Zijlstra <peterz(a)infradead.org> CC: Arnaldo Carvalho de Melo <acme(a)redhat.com> CC: Lai Jiangshan <laijs(a)cn.fujitsu.com> CC: Li Zefan <lizf(a)cn.fujitsu.com> CC: Christoph Hellwig <hch(a)lst.de> Signed-off-by: Steven Rostedt <rostedt(a)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) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |