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crypto: arm/sha1-ce - enable module autoloading based on CPU feature bits 

Make the module autoloadable by tying it to the CPU feature bit that
describes 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 10:23:38 +00:00 committed by Herbert Xu
parent c9d9f608b4
commit bd56f95ea9
1 changed files with 2 additions and 3 deletions
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5
arch/arm/crypto/sha1-ce-glue.c
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@ -11,6 +11,7 @@
#include <crypto/internal/hash.h>
#include <crypto/sha.h>
#include <crypto/sha1_base.h>
#include <linux/cpufeature.h>
#include <linux/crypto.h>
#include <linux/module.h>
@ -82,8 +83,6 @@ static struct shash_alg alg = {
static int __init sha1_ce_mod_init(void)
{
if (!(elf_hwcap2 & HWCAP2_SHA1))
return -ENODEV;
return crypto_register_shash(&alg);
}
@ -92,5 +91,5 @@ static void __exit sha1_ce_mod_fini(void)
crypto_unregister_shash(&alg);
}
module_init(sha1_ce_mod_init);
module_cpu_feature_match(SHA1, sha1_ce_mod_init);
module_exit(sha1_ce_mod_fini);