linux-kernel - [tip: x86/vdso] selftests: Emit a warning if getcpu() is missing on 32bit

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Message-ID: <167569546513.4906.15099899150796556318.tip-bot2@tip-bot2>
Date:   Mon, 06 Feb 2023 14:57:45 -0000
From:   "tip-bot2 for Sebastian Andrzej Siewior" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Shuah Khan <skhan@...uxfoundation.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/vdso] selftests: Emit a warning if getcpu() is missing on 32bit

The following commit has been merged into the x86/vdso branch of tip:

Commit-ID:     5646bbd6684acf5c9b9dedb863b7d2f6f5a330fb
Gitweb:        https://git.kernel.org/tip/5646bbd6684acf5c9b9dedb863b7d2f6f5a330fb
Author:        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
AuthorDate:    Fri, 25 Nov 2022 10:42:16 +01:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Mon, 06 Feb 2023 15:48:54 +01:00

selftests: Emit a warning if getcpu() is missing on 32bit

The VDSO implementation for getcpu() has been wired up on 32bit so warn if
missing.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Shuah Khan <skhan@...uxfoundation.org>
Link: https://lore.kernel.org/r/20221125094216.3663444-4-bigeasy@linutronix.de

---
 tools/testing/selftests/x86/test_vsyscall.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/x86/test_vsyscall.c b/tools/testing/selftests/x86/test_vsyscall.c
index 5b45e69..47cab97 100644
--- a/tools/testing/selftests/x86/test_vsyscall.c
+++ b/tools/testing/selftests/x86/test_vsyscall.c
@@ -92,11 +92,8 @@ static void init_vdso(void)
 		printf("[WARN]\tfailed to find time in vDSO\n");
 
 	vdso_getcpu = (getcpu_t)dlsym(vdso, "__vdso_getcpu");
-	if (!vdso_getcpu) {
-		/* getcpu() was never wired up in the 32-bit vDSO. */
-		printf("[%s]\tfailed to find getcpu in vDSO\n",
-		       sizeof(long) == 8 ? "WARN" : "NOTE");
-	}
+	if (!vdso_getcpu)
+		printf("[WARN]\tfailed to find getcpu in vDSO\n");
 }
 
 static int init_vsys(void)