From 8cf868affdc459beee1a941df0cfaba1673740e3 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Mon, 28 Nov 2016 13:03:21 -0500 Subject: tracing: Have the reg function allow to fail Some tracepoints have a registration function that gets enabled when the tracepoint is enabled. There may be cases that the registraction function must fail (for example, can't allocate enough memory). In this case, the tracepoint should also fail to register, otherwise the user would not know why the tracepoint is not working. Cc: David Howells Cc: Seiji Aguchi Cc: Anton Blanchard Cc: Mathieu Desnoyers Signed-off-by: Steven Rostedt --- include/linux/tracepoint-defs.h | 2 +- include/linux/tracepoint.h | 2 +- include/trace/events/i2c.h | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) (limited to 'include') diff --git a/include/linux/tracepoint-defs.h b/include/linux/tracepoint-defs.h index 4ac89acb6136..a03192052066 100644 --- a/include/linux/tracepoint-defs.h +++ b/include/linux/tracepoint-defs.h @@ -29,7 +29,7 @@ struct tracepoint_func { struct tracepoint { const char *name; /* Tracepoint name */ struct static_key key; - void (*regfunc)(void); + int (*regfunc)(void); void (*unregfunc)(void); struct tracepoint_func __rcu *funcs; }; diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h index be586c632a0c..f72fcfe0e66a 100644 --- a/include/linux/tracepoint.h +++ b/include/linux/tracepoint.h @@ -81,7 +81,7 @@ static inline void tracepoint_synchronize_unregister(void) } #ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS -extern void syscall_regfunc(void); +extern int syscall_regfunc(void); extern void syscall_unregfunc(void); #endif /* CONFIG_HAVE_SYSCALL_TRACEPOINTS */ diff --git a/include/trace/events/i2c.h b/include/trace/events/i2c.h index fe17187df65d..4abb8eab34d3 100644 --- a/include/trace/events/i2c.h +++ b/include/trace/events/i2c.h @@ -20,7 +20,7 @@ /* * drivers/i2c/i2c-core.c */ -extern void i2c_transfer_trace_reg(void); +extern int i2c_transfer_trace_reg(void); extern void i2c_transfer_trace_unreg(void); /* -- cgit v1.2.3