From: "Paul E. McKenney" <paulmck@kernel.org>
To: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: open list <linux-kernel@vger.kernel.org>,
lkft-triage@lists.linaro.org,
Linux Regressions <regressions@lists.linux.dev>,
Arnd Bergmann <arnd@arndb.de>,
Linux-sh list <linux-sh@vger.kernel.org>,
linux-snps-arc@lists.infradead.org,
Vineet Gupta <vgupta@kernel.org>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>
Subject: Re: sh: arc: cmpxchg.h:50:12: error: implicit declaration of function 'cmpxchg_emu_u8' [-Werror=implicit-function-declaration]
Date: Tue, 16 Apr 2024 19:19:32 -0700 [thread overview]
Message-ID: <e782ab32-6276-4947-a1ee-5864dc71dbe5@paulmck-laptop> (raw)
In-Reply-To: <CA+G9fYvMdqT3BFNkspktVVtVqd=en8-x3Oz1Ekfia+cceV2LHQ@mail.gmail.com>
On Mon, Apr 15, 2024 at 04:17:01PM +0530, Naresh Kamboju wrote:
> The arc and sh defconfig builds failed due to following build warnings / errors
> on the Linux next-20240415 with gcc-9 and gcc-11.
>
> Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
>
> Following builds failed.
> sh:
> arc:
> - defconfig
> - tinyconfig
> - allnoconfig
> - vdk_hs38_smp_defconfig
>
> Build log:
> --------
> In file included from arch/arc/include/asm/atomic.h:13,
> from include/linux/atomic.h:7,
> from include/asm-generic/bitops/lock.h:5,
> from arch/arc/include/asm/bitops.h:188,
> from include/linux/bitops.h:70,
> from include/linux/log2.h:12,
> from kernel/bounds.c:13:
> include/linux/atomic/atomic-arch-fallback.h: In function 'raw_atomic_cmpxchg':
> arch/arc/include/asm/cmpxchg.h:50:12: error: implicit declaration of
> function 'cmpxchg_emu_u8' [-Werror=implicit-function-declaration]
> 50 | _prev_ = cmpxchg_emu_u8((volatile u8 *)_p_, _o_, _n_); \
> | ^~~~~~~~~~~~~~
>
> Steps to reproduce:
> ---
> # tuxmake --runtime podman --target-arch arc --toolchain gcc-9
> --kconfig defconfig
> # tuxmake --runtime podman --target-arch sh --toolchain gcc-11
> --kconfig defconfig
>
>
> Links:
> ---
> - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240415/testrun/23463978/suite/build/test/gcc-9-defconfig/details/
> - https://storage.tuxsuite.com/public/linaro/lkft/builds/2f7sIl2MlKB5Fgq7JtTpYQ9lnXw/
> - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240415/testrun/23463981/suite/build/test/gcc-11-defconfig/details/
Thank you for testing this! Does the following diff (to be folded into
the originals with attribution) help?
Thanx, Paul
------------------------------------------------------------------------
diff --git a/arch/arc/include/asm/cmpxchg.h b/arch/arc/include/asm/cmpxchg.h
index c3833e18389f4..40101f9d88d45 100644
--- a/arch/arc/include/asm/cmpxchg.h
+++ b/arch/arc/include/asm/cmpxchg.h
@@ -8,6 +8,7 @@
#include <linux/build_bug.h>
#include <linux/types.h>
+#include <linux/cmpxchg-emu.h>
#include <asm/barrier.h>
#include <asm/smp.h>
diff --git a/arch/sh/include/asm/cmpxchg.h b/arch/sh/include/asm/cmpxchg.h
index 27a9040983cfe..726b3ad9c8703 100644
--- a/arch/sh/include/asm/cmpxchg.h
+++ b/arch/sh/include/asm/cmpxchg.h
@@ -9,6 +9,7 @@
#include <linux/compiler.h>
#include <linux/types.h>
+#include <linux/cmpxchg-emu.h>
#if defined(CONFIG_GUSA_RB)
#include <asm/cmpxchg-grb.h>
prev parent reply other threads:[~2024-04-17 2:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-15 10:47 sh: arc: cmpxchg.h:50:12: error: implicit declaration of function 'cmpxchg_emu_u8' [-Werror=implicit-function-declaration] Naresh Kamboju
2024-04-17 2:19 ` Paul E. McKenney [this message]
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