From: Stefan Agner <stefan@agner.ch>
To: herbert@gondor.apana.org.au, davem@davemloft.net,
ard.biesheuvel@linaro.org
Cc: linux@armlinux.org.uk, linux-crypto@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Stefan Agner <stefan@agner.ch>
Subject: [PATCH 1/2] cpufeature: avoid warning when compiling with clang
Date: Sat, 15 Sep 2018 21:38:24 -0700 [thread overview]
Message-ID: <20180916043825.23247-1-stefan@agner.ch> (raw)
The table id (second) argument to MODULE_DEVICE_TABLE is often
referenced otherwise. This is not the case for CPU features. This
leads to warnings when building the kernel with Clang:
arch/arm/crypto/aes-ce-glue.c:450:1: warning: variable
'cpu_feature_match_AES' is not needed and will not be emitted
[-Wunneeded-internal-declaration]
module_cpu_feature_match(AES, aes_init);
^
Avoid warnings by using __maybe_unused, similar to commit 1f318a8bafcf
("modules: mark __inittest/__exittest as __maybe_unused").
Fixes: 67bad2fdb754 ("cpu: add generic support for CPU feature based module autoloading")
Signed-off-by: Stefan Agner <stefan@agner.ch>
---
include/linux/cpufeature.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/cpufeature.h b/include/linux/cpufeature.h
index 986c06c88d81..84d3c81b5978 100644
--- a/include/linux/cpufeature.h
+++ b/include/linux/cpufeature.h
@@ -45,7 +45,7 @@
* 'asm/cpufeature.h' of your favorite architecture.
*/
#define module_cpu_feature_match(x, __initfunc) \
-static struct cpu_feature const cpu_feature_match_ ## x[] = \
+static struct cpu_feature const __maybe_unused cpu_feature_match_ ## x[] = \
{ { .feature = cpu_feature(x) }, { } }; \
MODULE_DEVICE_TABLE(cpu, cpu_feature_match_ ## x); \
\
--
2.19.0
next reply other threads:[~2018-09-16 4:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-16 4:38 Stefan Agner [this message]
2018-09-16 4:38 ` [PATCH 2/2] crypto: arm/crc32 - avoid warning when compiling with Clang Stefan Agner
2018-09-18 15:52 ` Ard Biesheuvel
2018-09-18 15:49 ` [PATCH 1/2] cpufeature: avoid warning when compiling with clang Ard Biesheuvel
2018-09-21 5:46 ` Herbert Xu
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