Hexagon: fix __atomic_add_unless

#define atomic_sub(i, v) atomic_sub_return(i, (v))

/**

 * atomic_add_unless - add unless the number is a given value

 * __atomic_add_unless - add unless the number is a given value

 * @v: pointer to value

 * @a: amount to add

 * @u: unless value is equal to u

 *

 * Returns 1 if the add happened, 0 if it didn't.

 * Returns old value.

 *

 */

static inline int __atomic_add_unless(atomic_t *v, int a, int u)

{

	int output, __oldval;

	int __oldval;

	register int tmp;

	asm volatile(

		"1:	%0 = memw_locked(%2);"

		"	{"

		"		p3 = cmp.eq(%0, %4);"

		"		if (p3.new) jump:nt 2f;"

		"		%0 = add(%0, %3);"

		"		%1 = #0;"

		"		%1 = add(%0, %3);"

		"	}"

		"	memw_locked(%2, p3) = %0;"

		"	memw_locked(%2, p3) = %1;"

		"	{"

		"		if !p3 jump 1b;"

		"		%1 = #1;"

		"	}"

		"2:"

		: "=&r" (__oldval), "=&r" (output)

		: "=&r" (__oldval), "=&r" (tmp)

		: "r" (v), "r" (a), "r" (u)

		: "memory", "p3"

	);

	return output;

	return __oldval;

}

#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)