[PATCH v2 04/20] crypto: aegis128-neon - Move to more abstract 'ksimd' guard API

[Ard Biesheuvel <ardb+git@google.com>]

From: Ard Biesheuvel <ardb@kernel.org>

Move away from calling kernel_neon_begin() and kernel_neon_end()
directly, and instead, use the newly introduced scoped_ksimd() API. This
permits arm64 to modify the kernel mode NEON API without affecting code
that is shared between ARM and arm64.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 crypto/aegis128-neon.c | 33 +++++++-------------
 1 file changed, 12 insertions(+), 21 deletions(-)

diff --git a/crypto/aegis128-neon.c b/crypto/aegis128-neon.c
index 9ee50549e823..b41807e63bd3 100644
--- a/crypto/aegis128-neon.c
+++ b/crypto/aegis128-neon.c
@@ -4,7 +4,7 @@
  */
 
 #include <asm/cpufeature.h>
-#include <asm/neon.h>
+#include <asm/simd.h>
 
 #include "aegis.h"
 #include "aegis-neon.h"
@@ -24,32 +24,28 @@ void crypto_aegis128_init_simd(struct aegis_state *state,
 			       const union aegis_block *key,
 			       const u8 *iv)
 {
-	kernel_neon_begin();
-	crypto_aegis128_init_neon(state, key, iv);
-	kernel_neon_end();
+	scoped_ksimd()
+		crypto_aegis128_init_neon(state, key, iv);
 }
 
 void crypto_aegis128_update_simd(struct aegis_state *state, const void *msg)
 {
-	kernel_neon_begin();
-	crypto_aegis128_update_neon(state, msg);
-	kernel_neon_end();
+	scoped_ksimd()
+		crypto_aegis128_update_neon(state, msg);
 }
 
 void crypto_aegis128_encrypt_chunk_simd(struct aegis_state *state, u8 *dst,
 					const u8 *src, unsigned int size)
 {
-	kernel_neon_begin();
-	crypto_aegis128_encrypt_chunk_neon(state, dst, src, size);
-	kernel_neon_end();
+	scoped_ksimd()
+		crypto_aegis128_encrypt_chunk_neon(state, dst, src, size);
 }
 
 void crypto_aegis128_decrypt_chunk_simd(struct aegis_state *state, u8 *dst,
 					const u8 *src, unsigned int size)
 {
-	kernel_neon_begin();
-	crypto_aegis128_decrypt_chunk_neon(state, dst, src, size);
-	kernel_neon_end();
+	scoped_ksimd()
+		crypto_aegis128_decrypt_chunk_neon(state, dst, src, size);
 }
 
 int crypto_aegis128_final_simd(struct aegis_state *state,
@@ -58,12 +54,7 @@ int crypto_aegis128_final_simd(struct aegis_state *state,
 			       unsigned int cryptlen,
 			       unsigned int authsize)
 {
-	int ret;
-
-	kernel_neon_begin();
-	ret = crypto_aegis128_final_neon(state, tag_xor, assoclen, cryptlen,
-					 authsize);
-	kernel_neon_end();
-
-	return ret;
+	scoped_ksimd()
+		return crypto_aegis128_final_neon(state, tag_xor, assoclen,
+						  cryptlen, authsize);
 }
-- 
2.51.0.618.g983fd99d29-goog