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cat << EOF
/**
* ${atomic}_fetch_add_unless - add unless the number is already a given value
* @v: pointer of type ${atomic}_t
* @a: the amount to add to v...
* @u: ...unless v is equal to u.
*
* Atomically adds @a to @v, so long as @v was not already @u.
* Returns original value of @v
*/
static inline ${int}
${atomic}_fetch_add_unless(${atomic}_t *v, ${int} a, ${int} u)
{
${int} c = ${atomic}_read(v);
do {
if (unlikely(c == u))
break;
} while (!${atomic}_try_cmpxchg(v, &c, c + a));
return c;
}
EOF
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