r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/kexec_crash_size', 0x0, 0x0)
r1 = epoll_create(0xef09)
epoll_ctl$EPOLL_CTL_ADD(r1, 0x1, r0, &(0x7f0000000080))