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crypto: arm/crc32 - enable module autoloading based on CPU feature bits

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Make the module autoloadable by tying it to the CPU feature bits that
describe whether the optional instructions it relies on are implemented
by the current CPU.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2017-05-21 10:23:40 +00:00 committed by Herbert Xu
parent a83ff88bed
commit 2a9faf8b7e
1 changed files with 6 additions and 0 deletions
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6
arch/arm/crypto/crc32-ce-glue.c
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@ -8,6 +8,7 @@
* published by the Free Software Foundation.
*/
#include <linux/cpufeature.h>
#include <linux/crc32.h>
#include <linux/init.h>
#include <linux/kernel.h>
@ -233,6 +234,11 @@ static void __exit crc32_pmull_mod_exit(void)
ARRAY_SIZE(crc32_pmull_algs));
}
static const struct cpu_feature crc32_cpu_feature[] = {
{ cpu_feature(CRC32) }, { cpu_feature(PMULL) }, { }
};
MODULE_DEVICE_TABLE(cpu, crc32_cpu_feature);
module_init(crc32_pmull_mod_init);
module_exit(crc32_pmull_mod_exit);