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authorSteven Rostedt <srostedt@redhat.com>2010-04-20 10:47:33 -0400
committerSteven Rostedt <rostedt@goodmis.org>2010-05-14 09:33:49 -0400
commit8f0820183056ad26dabc0202115848a92f1143fc (patch)
treec9e1cb9d41e37d5075704efbde3c97121820e0c5 /include/linux/syscalls.h
parent23e117fa44429cc054cb27d5621d64e4ced91e52 (diff)
tracing: Create class struct for events
This patch creates a ftrace_event_class struct that event structs point to. This class struct will be made to hold information to modify the events. Currently the class struct only holds the events system name. This patch slightly increases the size, but this change lays the ground work of other changes to make the footprint of tracepoints smaller. With 82 standard tracepoints, and 618 system call tracepoints (two tracepoints per syscall: enter and exit): text data bss dec hex filename 4913961 1088356 861512 6863829 68bbd5 vmlinux.orig 4914025 1088868 861512 6864405 68be15 vmlinux.class This patch also cleans up some stale comments in ftrace.h. v2: Fixed missing semi-colon in macro. Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Acked-by: Masami Hiramatsu <mhiramat@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include/linux/syscalls.h')
-rw-r--r--include/linux/syscalls.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 057929b0a651..ac5791df2506 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -134,6 +134,8 @@ struct perf_event_attr;
#define __SC_STR_TDECL5(t, a, ...) #t, __SC_STR_TDECL4(__VA_ARGS__)
#define __SC_STR_TDECL6(t, a, ...) #t, __SC_STR_TDECL5(__VA_ARGS__)
+extern struct ftrace_event_class event_class_syscalls;
+
#define SYSCALL_TRACE_ENTER_EVENT(sname) \
static const struct syscall_metadata __syscall_meta_##sname; \
static struct ftrace_event_call \
@@ -146,7 +148,7 @@ struct perf_event_attr;
__attribute__((section("_ftrace_events"))) \
event_enter_##sname = { \
.name = "sys_enter"#sname, \
- .system = "syscalls", \
+ .class = &event_class_syscalls, \
.event = &enter_syscall_print_##sname, \
.raw_init = init_syscall_trace, \
.define_fields = syscall_enter_define_fields, \
@@ -168,7 +170,7 @@ struct perf_event_attr;
__attribute__((section("_ftrace_events"))) \
event_exit_##sname = { \
.name = "sys_exit"#sname, \
- .system = "syscalls", \
+ .class = &event_class_syscalls, \
.event = &exit_syscall_print_##sname, \
.raw_init = init_syscall_trace, \
.define_fields = syscall_exit_define_fields, \