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crypto: arm/ghash-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>
hifive-unleashed-5.1
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);