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crypto: arm/ghash-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 10:23:37 +00:00 committed by Herbert Xu
parent 4d8061a591
commit c9d9f608b4
1 changed files with 2 additions and 4 deletions
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6
arch/arm/crypto/ghash-ce-glue.c
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@ -15,6 +15,7 @@
#include <crypto/cryptd.h>
#include <crypto/internal/hash.h>
#include <crypto/gf128mul.h>
#include <linux/cpufeature.h>
#include <linux/crypto.h>
#include <linux/module.h>
@ -311,9 +312,6 @@ static int __init ghash_ce_mod_init(void)
{
int err;
if (!(elf_hwcap2 & HWCAP2_PMULL))
return -ENODEV;
err = crypto_register_shash(&ghash_alg);
if (err)
return err;
@ -334,5 +332,5 @@ static void __exit ghash_ce_mod_exit(void)
crypto_unregister_shash(&ghash_alg);
}
module_init(ghash_ce_mod_init);
module_cpu_feature_match(PMULL, ghash_ce_mod_init);
module_exit(ghash_ce_mod_exit);