pmull_gcm_decrypt
void pmull_gcm_decrypt(int bytes, u64 dg[], const char *src,
pmull_gcm_decrypt(nblocks, dg, src, ctx, dst, iv,
ret = pmull_gcm_decrypt(nbytes, dst, src,
asmlinkage int pmull_gcm_decrypt(int bytes, u8 dst[], const u8 src[],