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crypto: arm/sha2-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 10:23:39 +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);