tracing: Create output file from cmd_check_undefined As the output file is currently never created, the check will run every time, even if the inputs have not changed. Create an empty output file which allows make to skip the execution when it is not necessary. Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Vincent Donnefort <vdonnefort@google.com> Cc: Marc Zyngier <maz@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Link: https://patch.msgid.link/20260520-tracing-ringbuffer-check-v1-1-d979cfab1338@weissschuh.net Fixes: 1211907ac0b5 ("tracing: Generate undef symbols allowlist for simple_ring_buffer") Fixes: 58b4bd18390e ("tracing: Adjust cmd_check_undefined to show unexpected undefined symbols") Reviewed-by: Nathan Chancellor <nathan@kernel.org> Tested-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile index 9b08341..8d3d96e 100644 --- a/kernel/trace/Makefile +++ b/kernel/trace/Makefile
@@ -154,7 +154,8 @@ echo "Unexpected symbols in $<:" >&2; \ echo "$$undefsyms" >&2; \ false; \ - fi + fi; \ + touch $@ $(obj)/%.o.checked: $(obj)/%.o $(obj)/undefsyms_base.o FORCE $(call if_changed,check_undefined)