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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>
zero-colors
Ard Biesheuvel 2017-05-21 10:23:40 +00:00 committed by Herbert Xu
parent a83ff88bed
commit 2a9faf8b7e
1 changed files with 6 additions and 0 deletions
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6
arch/arm/crypto/crc32-ce-glue.c
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@ -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);