[kernel] Remove last of old allocator interface

Removing the `allocator.h` file defining the `kutil::allocator`
interface, now that explicit allocators are not being passed around.
Also removed the unused `frame_allocator::raw_allocator` class and
`kutil::invalid_allocator` object.

Tags: memory

src/kernel/frame_allocator.cpp

@@ -1,3 +1,4 @@
+#include "kernel_memory.h"
 #include "kutil/assert.h"
 #include "kutil/memory.h"
 #include "frame_allocator.h"
@@ -17,30 +18,7 @@ frame_block::compare(const frame_block *rhs) const
 }
 
 
-frame_allocator::raw_alloc::raw_alloc(frame_allocator &fa) : m_fa(fa) {}
-
-void *
-frame_allocator::raw_alloc::allocate(size_t size)
-{
-	kassert(size <= frame_size, "Raw allocator only allocates a single page");
-
-	uintptr_t addr = 0;
-	if (size <= frame_size)
-		m_fa.allocate(1, &addr);
-	return reinterpret_cast<void*>(addr + page_offset);
-}
-
-void
-frame_allocator::raw_alloc::free(void *p)
-{
-	m_fa.free(reinterpret_cast<uintptr_t>(p), 1);
-}
-
-
-frame_allocator::frame_allocator() :
-	m_raw_alloc(*this)
-{
-}
+frame_allocator::frame_allocator() {}
 
 size_t
 frame_allocator::allocate(size_t count, uintptr_t *address)

src/kernel/frame_allocator.h

@@ -4,7 +4,6 @@
 
 #include <stdint.h>
 
-#include "kutil/allocator.h"
 #include "kutil/linked_list.h"
 
 struct frame_block;
@@ -30,23 +29,7 @@ public:
 	/// \arg count    The number of frames to be freed
 	void free(uintptr_t address, size_t count);
 
-	/// Get a memory allocator that allocates raw pages
-	/// \returns  The allocator ojbect
-	kutil::allocator & raw_allocator() { return m_raw_alloc; }
-
 private:
-	class raw_alloc :
-		public kutil::allocator
-	{
-	public:
-		raw_alloc(frame_allocator &fa);
-		virtual void * allocate(size_t size) override;
-		virtual void free(void *p) override;
-	private:
-		frame_allocator &m_fa;
-	};
-
-	raw_alloc m_raw_alloc;
 	frame_block_list m_free; ///< Free frames list
 
 	frame_allocator(const frame_allocator &) = delete;

src/kernel/scheduler.h

@@ -3,7 +3,6 @@
 /// The task scheduler and related definitions
 
 #include <stdint.h>
-#include "kutil/allocator.h"
 #include "process.h"
 
 class lapic;