Commit-ID: 53da59aa6dd881fd0bbdd058a8a299d90ce9dd1d
Gitweb: http://git.kernel.org/tip/53da59aa6dd881fd0bbdd058a8a299d90ce9dd1d
Author: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
AuthorDate: Fri, 30 Apr 2010 12:59:59 -0400
Committer: Steven Rostedt <rostedt@xxxxxxxxxxx>
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@xxxxxxxxxx>
Acked-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
LKML-Reference: <20100430165959.GA25605@Krystal>
CC: Ingo Molnar <mingo@xxxxxxx>
CC: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CC: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CC: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CC: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
CC: Li Zefan <lizf@xxxxxxxxxxxxxx>
CC: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
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-tip-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|