r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000001980)='/proc/partitions\x00', 0x0, 0x0)
preadv(r0, &(0x7f00000020c0)=[{&(0x7f00000019c0)=""/145, 0x91}], 0x1, 0x7, 0x0)