1cat << EOF 2/** 3 * arch_${atomic}_fetch_add_unless - add unless the number is already a given value 4 * @v: pointer of type ${atomic}_t 5 * @a: the amount to add to v... 6 * @u: ...unless v is equal to u. 7 * 8 * Atomically adds @a to @v, so long as @v was not already @u. 9 * Returns original value of @v 10 */ 11static __always_inline ${int} 12arch_${atomic}_fetch_add_unless(${atomic}_t *v, ${int} a, ${int} u) 13{ 14 ${int} c = arch_${atomic}_read(v); 15 16 do { 17 if (unlikely(c == u)) 18 break; 19 } while (!arch_${atomic}_try_cmpxchg(v, &c, c + a)); 20 21 return c; 22} 23EOF 24