From: Steven Rostedt <srost...@redhat.com> Sparse complains when is_signed_type() is used on a pointer. This macro is needed for the format output used for ftrace and perf, to know if a binary field is a signed type or not. The is_signed_type() macro is used against all fields that are recorded by events to automate the operation.
The problem sparse has is with the current way is_signed_type() works: ((type)-1 < 0) If "type" is a poiner, than sparse does not like it being compared to an integer (zero). The simple fix is to just give zero the same type. The runtime result stays the same. Reported-by: Robert Jarzmik <robert.jarz...@free.fr> Signed-off-by: Steven Rostedt <rost...@goodmis.org> --- include/linux/ftrace_event.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h index 642928c..cc87955 100644 --- a/include/linux/ftrace_event.h +++ b/include/linux/ftrace_event.h @@ -266,7 +266,7 @@ extern int trace_define_field(struct ftrace_event_call *call, const char *type, extern int trace_add_event_call(struct ftrace_event_call *call); extern void trace_remove_event_call(struct ftrace_event_call *call); -#define is_signed_type(type) (((type)(-1)) < 0) +#define is_signed_type(type) (((type)(-1)) < (type)0) int trace_set_clr_event(const char *system, const char *event, int set); -- 1.7.10.4
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