Kernel: Remove ability to create kernel-only regions at user addresses

This was only used by the mechanism for mapping executables into each
process's own address space. Now that we remap executables on demand
when needed for symbolication, this can go away.

Kernel/Process.cpp

@@ -207,7 +207,7 @@ Region* Process::allocate_region(VirtualAddress vaddr, size_t size, const String
     return allocate_region(range, name, prot, commit);
 }
 
-Region* Process::allocate_region_with_vmobject(const Range& range, NonnullRefPtr<VMObject> vmobject, size_t offset_in_vmobject, const String& name, int prot, bool user_accessible)
+Region* Process::allocate_region_with_vmobject(const Range& range, NonnullRefPtr<VMObject> vmobject, size_t offset_in_vmobject, const String& name, int prot)
 {
     ASSERT(range.is_valid());
     size_t end_in_vmobject = offset_in_vmobject + range.size();
@@ -224,21 +224,17 @@ Region* Process::allocate_region_with_vmobject(const Range& range, NonnullRefPtr
         return nullptr;
     }
     offset_in_vmobject &= PAGE_MASK;
-    Region* region;
-    if (user_accessible)
-        region = &add_region(Region::create_user_accessible(range, move(vmobject), offset_in_vmobject, name, prot_to_region_access_flags(prot)));
-    else
-        region = &add_region(Region::create_kernel_only(range, move(vmobject), offset_in_vmobject, name, prot_to_region_access_flags(prot)));
-    region->map(page_directory());
-    return region;
+    auto& region = add_region(Region::create_user_accessible(range, move(vmobject), offset_in_vmobject, name, prot_to_region_access_flags(prot)));
+    region.map(page_directory());
+    return &region;
 }
 
-Region* Process::allocate_region_with_vmobject(VirtualAddress vaddr, size_t size, NonnullRefPtr<VMObject> vmobject, size_t offset_in_vmobject, const String& name, int prot, bool user_accessible)
+Region* Process::allocate_region_with_vmobject(VirtualAddress vaddr, size_t size, NonnullRefPtr<VMObject> vmobject, size_t offset_in_vmobject, const String& name, int prot)
 {
     auto range = allocate_range(vaddr, size);
     if (!range.is_valid())
         return nullptr;
-    return allocate_region_with_vmobject(range, move(vmobject), offset_in_vmobject, name, prot, user_accessible);
+    return allocate_region_with_vmobject(range, move(vmobject), offset_in_vmobject, name, prot);
 }
 
 bool Process::deallocate_region(Region& region)

Kernel/Process.h

@@ -366,9 +366,9 @@ public:
 
     bool is_superuser() const { return m_euid == 0; }
 
-    Region* allocate_region_with_vmobject(VirtualAddress, size_t, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const String& name, int prot, bool user_accessible = true);
+    Region* allocate_region_with_vmobject(VirtualAddress, size_t, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const String& name, int prot);
     Region* allocate_region(VirtualAddress, size_t, const String& name, int prot = PROT_READ | PROT_WRITE, bool commit = true);
-    Region* allocate_region_with_vmobject(const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const String& name, int prot, bool user_accessible = true);
+    Region* allocate_region_with_vmobject(const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const String& name, int prot);
     Region* allocate_region(const Range&, const String& name, int prot = PROT_READ | PROT_WRITE, bool commit = true);
     bool deallocate_region(Region& region);