r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000640)='/proc/asound/seq/clients\x00', 0x0, 0x0)
mmap$IORING_OFF_SQ_RING(&(0x7f0000ffd000/0x2000)=nil, 0x2000, 0x4, 0x12, r0, 0x0)