crypto: x86 - convert to use crypto_simd_usable()

Replace all calls to irq_fpu_usable() in the x86 crypto code with
crypto_simd_usable(), in order to allow testing the no-SIMD code paths.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/x86/crypto/crct10dif-pclmul_glue.c

@@ -26,12 +26,13 @@
 #include <linux/module.h>
 #include <linux/crc-t10dif.h>
 #include <crypto/internal/hash.h>
+#include <crypto/internal/simd.h>
 #include <linux/init.h>
 #include <linux/string.h>
 #include <linux/kernel.h>
-#include <asm/fpu/api.h>
 #include <asm/cpufeatures.h>
 #include <asm/cpu_device_id.h>
+#include <asm/simd.h>
 
 asmlinkage u16 crc_t10dif_pcl(u16 init_crc, const u8 *buf, size_t len);
 
@@ -53,7 +54,7 @@ static int chksum_update(struct shash_desc *desc, const u8 *data,
 {
 	struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
 
-	if (length >= 16 && irq_fpu_usable()) {
+	if (length >= 16 && crypto_simd_usable()) {
 		kernel_fpu_begin();
 		ctx->crc = crc_t10dif_pcl(ctx->crc, data, length);
 		kernel_fpu_end();
@@ -73,7 +74,7 @@ static int chksum_final(struct shash_desc *desc, u8 *out)
 static int __chksum_finup(__u16 *crcp, const u8 *data, unsigned int len,
 			u8 *out)
 {
-	if (len >= 16 && irq_fpu_usable()) {
+	if (len >= 16 && crypto_simd_usable()) {
 		kernel_fpu_begin();
 		*(__u16 *)out = crc_t10dif_pcl(*crcp, data, len);
 		kernel_fpu_end();