r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000000)='/sys/power/reserved_size', 0x0, 0x0)
r1 = openat$tcp_mem(0xffffffffffffff9c, &(0x7f00000000c0)='/proc/sys/net/ipv4/tcp_wmem\x00', 0x1, 0x0)
sendfile(r1, r0, 0x0, 0x9)