From: "tip-bot2 for Adrian Hunter" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Naresh Kamboju <naresh.kamboju@linaro.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Linux Kernel Functional Testing <lkft@linaro.org>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: [tip: timers/urgent] bug: Fix no-return-statement warning with !CONFIG_BUG
Date: Wed, 10 Apr 2024 20:05:48 -0000 [thread overview]
Message-ID: <171277954823.10875.13569747246376964639.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20240410153212.127477-1-adrian.hunter@intel.com>
The following commit has been merged into the timers/urgent branch of tip:
Commit-ID: 5284984a4fbacb0883bfebe905902cdda2891a07
Gitweb: https://git.kernel.org/tip/5284984a4fbacb0883bfebe905902cdda2891a07
Author: Adrian Hunter <adrian.hunter@intel.com>
AuthorDate: Wed, 10 Apr 2024 18:32:12 +03:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Wed, 10 Apr 2024 22:01:35 +02:00
bug: Fix no-return-statement warning with !CONFIG_BUG
BUG() does not return, and arch implementations of BUG() use unreachable()
or other non-returning code. However with !CONFIG_BUG, the default
implementation is often used instead, and that does not do that. x86 always
uses its own implementation, but powerpc with !CONFIG_BUG gives a build
error:
kernel/time/timekeeping.c: In function ‘timekeeping_debug_get_ns’:
kernel/time/timekeeping.c:286:1: error: no return statement in function
returning non-void [-Werror=return-type]
Add unreachable() to default !CONFIG_BUG BUG() implementation.
Fixes: e8e9d21a5df6 ("timekeeping: Refactor timekeeping helpers")
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>
Link: https://lore.kernel.org/r/20240410153212.127477-1-adrian.hunter@intel.com
Closes: https://lore.kernel.org/all/CA+G9fYvjdZCW=7ZGxS6A_3bysjQ56YF7S-+PNLQ_8a4DKh1Bhg@mail.gmail.com/
---
include/asm-generic/bug.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index 6e79442..b7de3a4 100644
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -156,7 +156,10 @@ extern __printf(1, 2) void __warn_printk(const char *fmt, ...);
#else /* !CONFIG_BUG */
#ifndef HAVE_ARCH_BUG
-#define BUG() do {} while (1)
+#define BUG() do { \
+ do {} while (1); \
+ unreachable(); \
+} while (0)
#endif
#ifndef HAVE_ARCH_BUG_ON
next prev parent reply other threads:[~2024-04-10 20:05 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-10 15:32 [PATCH] bug: Fix no-return-statement warning with !CONFIG_BUG Adrian Hunter
2024-04-10 15:32 ` Adrian Hunter
2024-04-10 17:02 ` Naresh Kamboju
2024-04-10 17:02 ` Naresh Kamboju
2024-04-10 20:05 ` tip-bot2 for Adrian Hunter [this message]
2024-04-11 7:04 ` Arnd Bergmann
2024-04-11 7:04 ` Arnd Bergmann
2024-04-11 7:16 ` Adrian Hunter
2024-04-11 7:16 ` Adrian Hunter
2024-04-11 7:56 ` Arnd Bergmann
2024-04-11 9:03 ` Adrian Hunter
2024-04-11 10:27 ` David Laight
2024-04-11 8:13 ` Christophe Leroy
2024-04-11 8:13 ` Christophe Leroy
2024-04-11 8:22 ` Christophe Leroy
2024-04-11 8:22 ` Christophe Leroy
2024-04-11 9:27 ` Adrian Hunter
2024-04-11 9:27 ` Adrian Hunter
2024-04-11 11:26 ` Arnd Bergmann
2024-04-11 11:26 ` Arnd Bergmann
2024-04-15 2:19 ` Michael Ellerman
2024-04-15 15:35 ` Arnd Bergmann
2024-04-15 15:35 ` Arnd Bergmann
2024-04-15 17:07 ` Christophe Leroy
2024-04-15 17:32 ` Arnd Bergmann
2024-04-15 17:32 ` Arnd Bergmann
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