ReuseFutureTest: do not use an offset when writing to an eventfd
Eventfd's does not support seeking. This is also invalid code: int main() { int64_t b = 42; int efd = eventfd(0, 0); if (efd < 0) err(EXIT_FAILURE, "creating eventfd failed"); ssize_t res = pwrite(efd, &b, sizeof(b), 0); if (res != sizeof(b)) err(EXIT_FAILURE, "pwrite to evfd failed"); }
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