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authorSteven Rostedt <srostedt@redhat.com>2012-12-14 22:15:08 +0400
committerSteven Rostedt <rostedt@goodmis.org>2013-01-21 22:22:28 +0400
commit418c59e49ddc77fcb7054f2c8d52c9d47403b43e (patch)
treea6ad61da008f95849076912a3485237d14ec3e46 /include/linux/ftrace_event.h
parentc1bf08ac26e92122faab9f6c32ea8aba94612dae (diff)
downloadlinux-418c59e49ddc77fcb7054f2c8d52c9d47403b43e.tar.xz
tracing: Fix sparse warning with is_signed_type() macro
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.jarzmik@free.fr> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include/linux/ftrace_event.h')
-rw-r--r--include/linux/ftrace_event.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index a3d489531d83..43ef8b6cce7f 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -272,7 +272,7 @@ 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);