r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000040)='/proc/mdstat\x00', 0x0, 0x0)
preadv(r0, &(0x7f0000001900)=[{&(0x7f00000015c0)=""/203, 0xcb}], 0x1, 0xa8, 0x0)