linux-kernel - [PATCH v4 18/18] perf build: Enable -Wthread-safety with clang

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Message-Id: <20220826164242.43412-19-irogers@google.com>
Date:   Fri, 26 Aug 2022 09:42:42 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
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        Thomas Gleixner <tglx@...utronix.de>,
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        Nathan Chancellor <nathan@...nel.org>,
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        Riccardo Mancini <rickyman7@...il.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Zechuan Chen <chenzechuan1@...wei.com>,
        Jason Wang <wangborong@...rlc.com>,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Remi Bernon <rbernon@...eweavers.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        bpf@...r.kernel.org, llvm@...ts.linux.dev
Cc:     Ian Rogers <irogers@...gle.com>
Subject: [PATCH v4 18/18] perf build: Enable -Wthread-safety with clang

If building with clang then enable -Wthread-safety warnings.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/Makefile.config | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index c41a090c0652..72dadafdbad9 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -19,6 +19,11 @@ detected_var = $(shell echo "$(1)=$($(1))" >> $(OUTPUT).config-detected)
 CFLAGS := $(EXTRA_CFLAGS) $(filter-out -Wnested-externs,$(EXTRA_WARNINGS))
 HOSTCFLAGS := $(filter-out -Wnested-externs,$(EXTRA_WARNINGS))
 
+# Enabled Wthread-safety analysis for clang builds.
+ifeq ($(CC_NO_CLANG), 0)
+  CFLAGS += -Wthread-safety
+endif
+
 include $(srctree)/tools/scripts/Makefile.arch
 
 $(call detected_var,SRCARCH)
-- 
2.37.2.672.g94769d06f0-goog