From: Eric Dumazet
Date: Wed, 29 Aug 2018 11:50:12 -0700
> This reverts commit 71e41286203c017d24f041a7cd71abea7ca7b1e0.
>
> mmap()/munmap() can not be backed by kmalloced pages :
>
> We fault in :
>
> VM_BUG_ON_PAGE(PageSlab(page), page);
>
> unmap_single_vma+0x8a/0x110
> unmap_v
This reverts commit 71e41286203c017d24f041a7cd71abea7ca7b1e0.
mmap()/munmap() can not be backed by kmalloced pages :
We fault in :
VM_BUG_ON_PAGE(PageSlab(page), page);
unmap_single_vma+0x8a/0x110
unmap_vmas+0x4b/0x90
unmap_region+0xc9/0x140
do_munmap+0x274/0x360
vm_munm
