[PATCH 1/5] crypto: arm/aes-ce - enable module autoloading based on CPU feature bits
Ard Biesheuvel
ard.biesheuvel at linaro.org
Sun May 21 03:23:36 PDT 2017
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 at linaro.org>
---
arch/arm/crypto/aes-ce-glue.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/arch/arm/crypto/aes-ce-glue.c b/arch/arm/crypto/aes-ce-glue.c
index 883b84d828c5..0f966a8ca1ce 100644
--- a/arch/arm/crypto/aes-ce-glue.c
+++ b/arch/arm/crypto/aes-ce-glue.c
@@ -14,6 +14,7 @@
#include <crypto/aes.h>
#include <crypto/internal/simd.h>
#include <crypto/internal/skcipher.h>
+#include <linux/cpufeature.h>
#include <linux/module.h>
#include <crypto/xts.h>
@@ -425,9 +426,6 @@ static int __init aes_init(void)
int err;
int i;
- if (!(elf_hwcap2 & HWCAP2_AES))
- return -ENODEV;
-
err = crypto_register_skciphers(aes_algs, ARRAY_SIZE(aes_algs));
if (err)
return err;
@@ -451,5 +449,5 @@ static int __init aes_init(void)
return err;
}
-module_init(aes_init);
+module_cpu_feature_match(AES, aes_init);
module_exit(aes_exit);
--
2.7.4
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