linux-kernel - [PATCH v1 3/5] tool build: Remove __get

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Message-ID: <20251110013152.3099080-4-irogers@google.com>
Date: Sun,  9 Nov 2025 17:31:50 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	John Garry <john.g.garry@...cle.com>, Will Deacon <will@...nel.org>, 
	James Clark <james.clark@...aro.org>, Mike Leach <mike.leach@...aro.org>, 
	Leo Yan <leo.yan@...ux.dev>, Suzuki K Poulose <suzuki.poulose@....com>, 
	Yicong Yang <yangyicong@...ilicon.com>, Jonathan Cameron <jonathan.cameron@...wei.com>, 
	Thomas Gleixner <tglx@...utronix.de>, Darren Hart <dvhart@...radead.org>, 
	Davidlohr Bueso <dave@...olabs.net>, 
	"André Almeida" <andrealmeid@...lia.com>, Tomas Glozar <tglozar@...hat.com>, 
	Quentin Monnet <qmo@...nel.org>, Yuzhuo Jing <yuzhuo@...gle.com>, Blake Jones <blakejones@...gle.com>, 
	Charlie Jenkins <charlie@...osinc.com>, Yeoreum Yun <yeoreum.yun@....com>, 
	Athira Rajeev <atrajeev@...ux.ibm.com>, Ravi Bangoria <ravi.bangoria@....com>, 
	Collin Funk <collin.funk1@...il.com>, Dapeng Mi <dapeng1.mi@...ux.intel.com>, 
	Thomas Richter <tmricht@...ux.ibm.com>, Dmitry Vyukov <dvyukov@...gle.com>, 
	Andi Kleen <ak@...ux.intel.com>, Howard Chu <howardchu95@...il.com>, 
	Zecheng Li <zecheng@...gle.com>, tanze <tanze@...inos.cn>, 
	Gabriele Monaco <gmonaco@...hat.com>, GuoHan Zhao <zhaoguohan@...inos.cn>, 
	Markus Elfring <Markus.Elfring@....de>, Colin Ian King <colin.i.king@...il.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, "Dr. David Alan Gilbert" <linux@...blig.org>, 
	Jean-Philippe Romain <jean-philippe.romain@...s.st.com>, Yang Li <yang.lee@...ux.alibaba.com>, 
	linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: [PATCH v1 3/5] tool build: Remove __get_cpuid feature test

This feature test is no longer used so remove.

The function tested by the feature test is used in:
tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c
however, the Makefile just assumes the presence of the function and
doesn't perform a build feature test for it.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/build/Makefile.feature         | 2 --
 tools/build/feature/Makefile         | 4 ----
 tools/build/feature/test-all.c       | 5 -----
 tools/build/feature/test-get_cpuid.c | 8 --------
 4 files changed, 19 deletions(-)
 delete mode 100644 tools/build/feature/test-get_cpuid.c

diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
index 32bbe29fe5f6..fc6abe369f73 100644
--- a/tools/build/Makefile.feature
+++ b/tools/build/Makefile.feature
@@ -90,7 +90,6 @@ FEATURE_TESTS_BASIC :=                  \
         timerfd                         \
         zlib                            \
         lzma                            \
-        get_cpuid                       \
         bpf                             \
         scandirat			\
         sched_getcpu			\
@@ -146,7 +145,6 @@ FEATURE_DISPLAY ?=              \
          llvm-perf              \
          zlib                   \
          lzma                   \
-         get_cpuid              \
          bpf			\
          libaio			\
          libzstd
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index 49b0add392b1..7c90e0d0157a 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -56,7 +56,6 @@ FILES=                                          \
          test-lzma.bin                          \
          test-bpf.bin                           \
          test-libbpf.bin                        \
-         test-get_cpuid.bin                     \
          test-sdt.bin                           \
          test-cxx.bin                           \
          test-gettid.bin			\
@@ -318,9 +317,6 @@ $(OUTPUT)test-zlib.bin:
 $(OUTPUT)test-lzma.bin:
 	$(BUILD) -llzma
 
-$(OUTPUT)test-get_cpuid.bin:
-	$(BUILD)
-
 $(OUTPUT)test-bpf.bin:
 	$(BUILD)
 
diff --git a/tools/build/feature/test-all.c b/tools/build/feature/test-all.c
index 8a354b81417c..eb346160d0ba 100644
--- a/tools/build/feature/test-all.c
+++ b/tools/build/feature/test-all.c
@@ -114,10 +114,6 @@
 # include "test-lzma.c"
 #undef main
 
-#define main main_test_get_cpuid
-# include "test-get_cpuid.c"
-#undef main
-
 #define main main_test_bpf
 # include "test-bpf.c"
 #undef main
@@ -168,7 +164,6 @@ int main(int argc, char *argv[])
 	main_test_pthread_attr_setaffinity_np();
 	main_test_pthread_barrier();
 	main_test_lzma();
-	main_test_get_cpuid();
 	main_test_bpf();
 	main_test_scandirat();
 	main_test_sched_getcpu();
diff --git a/tools/build/feature/test-get_cpuid.c b/tools/build/feature/test-get_cpuid.c
deleted file mode 100644
index bb4f065f28a6..000000000000
--- a/tools/build/feature/test-get_cpuid.c
+++ /dev/null
@@ -1,8 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <cpuid.h>
-
-int main(void)
-{
-	unsigned int eax = 0, ebx = 0, ecx = 0, edx = 0;
-	return __get_cpuid(0x15, &eax, &ebx, &ecx, &edx);
-}
-- 
2.51.2.1041.gc1ab5b90ca-goog