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[v2,2/5] crypto: arm/aes-ce - enable module autoloading based on CPU feature bits

Message ID 1484154118-22139-3-git-send-email-ard.biesheuvel@linaro.org
State New
Headers show

Commit Message

Ard Biesheuvel Jan. 11, 2017, 5:01 p.m. UTC 
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>

---
 arch/arm/crypto/aes-ce-glue.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

-- 
2.7.4


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diff mbox

Patch

diff --git a/arch/arm/crypto/aes-ce-glue.c b/arch/arm/crypto/aes-ce-glue.c
index 8857531915bf..98c68ad101e5 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>
 
@@ -428,9 +429,6 @@  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;
@@ -454,5 +452,5 @@  static int __init aes_init(void)
 	return err;
 }
 
-module_init(aes_init);
+module_cpu_feature_match(AES, aes_init);
 module_exit(aes_exit);