crypto: x86/aesni-gcm - make 'struct aesni_gcm_tfm_s' static const

Add missing static keywords to fix the following sparse warnings:

    arch/x86/crypto/aesni-intel_glue.c:197:24: warning: symbol 'aesni_gcm_tfm_sse' was not declared. Should it be static?
    arch/x86/crypto/aesni-intel_glue.c:246:24: warning: symbol 'aesni_gcm_tfm_avx_gen2' was not declared. Should it be static?
    arch/x86/crypto/aesni-intel_glue.c:291:24: warning: symbol 'aesni_gcm_tfm_avx_gen4' was not declared. Should it be static?

I also made the affected structures 'const', and adjusted the
indentation in the struct definition to not be insane.

Cc: Dave Watson <davejwatson@fb.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/x86/crypto/aesni-intel_glue.c

@@ -175,26 +175,18 @@ asmlinkage void aesni_gcm_finalize(void *ctx,
 				   struct gcm_context_data *gdata,
 				   u8 *auth_tag, unsigned long auth_tag_len);
 
-static struct aesni_gcm_tfm_s {
-void (*init)(void *ctx,
-				struct gcm_context_data *gdata,
-				u8 *iv,
-				u8 *hash_subkey, const u8 *aad,
-				unsigned long aad_len);
-void (*enc_update)(void *ctx,
-					struct gcm_context_data *gdata, u8 *out,
-					const u8 *in,
-					unsigned long plaintext_len);
-void (*dec_update)(void *ctx,
-					struct gcm_context_data *gdata, u8 *out,
-					const u8 *in,
-					unsigned long ciphertext_len);
-void (*finalize)(void *ctx,
-				struct gcm_context_data *gdata,
+static const struct aesni_gcm_tfm_s {
+	void (*init)(void *ctx, struct gcm_context_data *gdata, u8 *iv,
+		     u8 *hash_subkey, const u8 *aad, unsigned long aad_len);
+	void (*enc_update)(void *ctx, struct gcm_context_data *gdata, u8 *out,
+			   const u8 *in, unsigned long plaintext_len);
+	void (*dec_update)(void *ctx, struct gcm_context_data *gdata, u8 *out,
+			   const u8 *in, unsigned long ciphertext_len);
+	void (*finalize)(void *ctx, struct gcm_context_data *gdata,
 			 u8 *auth_tag, unsigned long auth_tag_len);
 } *aesni_gcm_tfm;
 
-struct aesni_gcm_tfm_s aesni_gcm_tfm_sse = {
+static const struct aesni_gcm_tfm_s aesni_gcm_tfm_sse = {
 	.init = &aesni_gcm_init,
 	.enc_update = &aesni_gcm_enc_update,
 	.dec_update = &aesni_gcm_dec_update,
@@ -243,7 +235,7 @@ asmlinkage void aesni_gcm_dec_avx_gen2(void *ctx,
 			const u8 *aad, unsigned long aad_len,
 			u8 *auth_tag, unsigned long auth_tag_len);
 
-struct aesni_gcm_tfm_s aesni_gcm_tfm_avx_gen2 = {
+static const struct aesni_gcm_tfm_s aesni_gcm_tfm_avx_gen2 = {
 	.init = &aesni_gcm_init_avx_gen2,
 	.enc_update = &aesni_gcm_enc_update_avx_gen2,
 	.dec_update = &aesni_gcm_dec_update_avx_gen2,
@@ -288,7 +280,7 @@ asmlinkage void aesni_gcm_dec_avx_gen4(void *ctx,
 			const u8 *aad, unsigned long aad_len,
 			u8 *auth_tag, unsigned long auth_tag_len);
 
-struct aesni_gcm_tfm_s aesni_gcm_tfm_avx_gen4 = {
+static const struct aesni_gcm_tfm_s aesni_gcm_tfm_avx_gen4 = {
 	.init = &aesni_gcm_init_avx_gen4,
 	.enc_update = &aesni_gcm_enc_update_avx_gen4,
 	.dec_update = &aesni_gcm_dec_update_avx_gen4,
@@ -778,7 +770,7 @@ static int gcmaes_crypt_by_sg(bool enc, struct aead_request *req,
 {
 	struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 	unsigned long auth_tag_len = crypto_aead_authsize(tfm);
-	struct aesni_gcm_tfm_s *gcm_tfm = aesni_gcm_tfm;
+	const struct aesni_gcm_tfm_s *gcm_tfm = aesni_gcm_tfm;
 	struct gcm_context_data data AESNI_ALIGN_ATTR;
 	struct scatter_walk dst_sg_walk = {};
 	unsigned long left = req->cryptlen;