[PATCH 6/6] extend the upper limit of kernel physical address randomization to 4G

Since now kaslr can separately do randomization of physical and virtual address, the physical address doesn't have to be CONFIG_RANDOMIZE_BASE_MAX_OFFSET any more. At this time the identity mapping only covers [0, 4G], so extend the upper limit of kernel physical address randomization to 4G.

[PATCH 6/6] extend the upper limit of kernel physical address randomization to 4G

Since now kaslr can separately do randomization of physical and virtual address, the physical address doesn't have to be CONFIG_RANDOMIZE_BASE_MAX_OFFSET any more. At this time the identity mapping only covers [0, 4G], so extend the upper limit of kernel physical address randomization to 4G.