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crypto: arm/sha2-ce - enable module autoloading based on CPU feature bits

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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 10:23:39 +00:00 committed by Herbert Xu
parent bd56f95ea9
commit a83ff88bed
1 changed files with 2 additions and 3 deletions
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5
arch/arm/crypto/sha2-ce-glue.c
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@ -11,6 +11,7 @@
#include <crypto/internal/hash.h>
#include <crypto/sha.h>
#include <crypto/sha256_base.h>
#include <linux/cpufeature.h>
#include <linux/crypto.h>
#include <linux/module.h>
@ -100,8 +101,6 @@ static struct shash_alg algs[] = { {
static int __init sha2_ce_mod_init(void)
{
if (!(elf_hwcap2 & HWCAP2_SHA2))
return -ENODEV;
return crypto_register_shashes(algs, ARRAY_SIZE(algs));
}
@ -110,5 +109,5 @@ static void __exit sha2_ce_mod_fini(void)
crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
}
module_init(sha2_ce_mod_init);
module_cpu_feature_match(SHA2, sha2_ce_mod_init);
module_exit(sha2_ce_mod_fini);