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cpufeature: avoid warning when compiling with clang 

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 1f318a8baf
("modules: mark __inittest/__exittest as __maybe_unused").

Fixes: 67bad2fdb7 ("cpu: add generic support for CPU feature based module autoloading")
Signed-off-by: Stefan Agner <stefan@agner.ch>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Stefan Agner 2018-09-15 21:38:24 -07:00 committed by Herbert Xu
parent e93720606e
commit c785896b21
1 changed files with 1 additions and 1 deletions
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2
include/linux/cpufeature.h
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@ -45,7 +45,7 @@
* 'asm/cpufeature.h' of your favorite architecture. * 'asm/cpufeature.h' of your favorite architecture.
*/ */
#define module_cpu_feature_match(x, __initfunc) \ #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) }, { } }; \ { { .feature = cpu_feature(x) }, { } }; \
MODULE_DEVICE_TABLE(cpu, cpu_feature_match_ ## x); \ MODULE_DEVICE_TABLE(cpu, cpu_feature_match_ ## x); \
\ \