moduleparam: use __UNIQUE_ID()

/* Chosen so that structs with an unsigned long line up. */

#define MAX_PARAM_PREFIX_LEN (64 - sizeof(unsigned long))

#define ___module_cat(a,b) __mod_ ## a ## b

#define __module_cat(a,b) ___module_cat(a,b)

#ifdef MODULE

#define __MODULE_INFO(tag, name, info)					  \

static const char __module_cat(name,__LINE__)[]				  \

static const char __UNIQUE_ID(name)[]					  \

  __used __attribute__((section(".modinfo"), unused, aligned(1)))	  \

  = __stringify(tag) "=" info

#else  /* !MODULE */

/* This struct is here for syntactic coherency, it is not used */

#define __MODULE_INFO(tag, name, info)					  \

  struct __module_cat(name,__LINE__) {}

  struct __UNIQUE_ID(name) {}

#endif

#define __MODULE_PARM_TYPE(name, _type)					  \

  __MODULE_INFO(parmtype, name##type, #name ":" _type)