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| author | Steven Rostedt <rostedt@goodmis.org> | 2025-10-21 20:43:43 -0400 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2025-10-24 16:43:15 -0400 |
| commit | 01ecf7af00b86daf7ac441b9f94d4873d2b8fc74 (patch) | |
| tree | 672e564e853bbf89ac84c3b1cc4f271019b3ad25 | |
| parent | eec3516b25069d8cb51b78375e337c69a3f9e789 (diff) | |
tracing: Add warnings for unused tracepoints for modules
If a modules has TRACE_EVENT() but does not use it, add a warning about it
at build time.
Currently, the build must be made by adding "UT=1" to the make command
line in order for this to trigger.
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nicolas Schier <nicolas.schier@linux.dev>
Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://lore.kernel.org/20251022004453.422000794@kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
| -rw-r--r-- | scripts/Makefile.modfinal | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/scripts/Makefile.modfinal b/scripts/Makefile.modfinal index 542ba462ed3e..149e12ff5700 100644 --- a/scripts/Makefile.modfinal +++ b/scripts/Makefile.modfinal @@ -28,6 +28,10 @@ ccflags-remove-y := $(CC_FLAGS_CFI) .module-common.o: $(srctree)/scripts/module-common.c FORCE $(call if_changed_rule,cc_o_c) +ifneq ($(WARN_ON_UNUSED_TRACEPOINTS),) +cmd_check_tracepoint = $(objtree)/scripts/tracepoint-update --module $<; +endif + quiet_cmd_ld_ko_o = LD [M] $@ cmd_ld_ko_o = \ $(LD) -r $(KBUILD_LDFLAGS) \ @@ -57,6 +61,7 @@ if_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check), \ ifdef CONFIG_DEBUG_INFO_BTF_MODULES +$(if $(newer-prereqs),$(call cmd,btf_ko)) endif + +$(call cmd,check_tracepoint) targets += $(modules:%.o=%.ko) $(modules:%.o=%.mod.o) .module-common.o |