PAGE_WRITE
#define PAGE_SHARED PAGE_WRITE
[VM_SHARED | VM_WRITE] = PAGE_WRITE,
[VM_SHARED | VM_WRITE | VM_READ] = PAGE_WRITE,
[VM_SHARED | VM_EXEC | VM_WRITE] = PAGE_WRITE,
[VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = PAGE_WRITE
#define PAGE_SHARED PAGE_WRITE
prot = PAGE_WRITE;
prot = pgprot_noncached(PAGE_WRITE);