crypto: arm/crc32 - enable module autoloading based on CPU feature bits

Make the module autoloadable by tying it to the CPU feature bits that
describe 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>

diff --git a/arch/arm/crypto/crc32-ce-glue.c b/arch/arm/crypto/crc32-ce-glue.c
index e1566bec1016ee87204fe263c4d11fe3a6fc45e4..1b0e0e86ee9c205b16d306f8a76ee9cac90cfee2 100644 (file)
--- a/arch/arm/crypto/crc32-ce-glue.c
+++ b/arch/arm/crypto/crc32-ce-glue.c
@@ -8,6 +8,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <linux/cpufeature.h>
 #include <linux/crc32.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -233,6 +234,11 @@ static void __exit crc32_pmull_mod_exit(void)
                                  ARRAY_SIZE(crc32_pmull_algs));
 }
 
+static const struct cpu_feature crc32_cpu_feature[] = {
+       { cpu_feature(CRC32) }, { cpu_feature(PMULL) }, { }
+};
+MODULE_DEVICE_TABLE(cpu, crc32_cpu_feature);
+
 module_init(crc32_pmull_mod_init);
 module_exit(crc32_pmull_mod_exit);