x86/mm/pat: Move the memtype related files to arch/x86/mm/pat/

- pat.c offers, dominantly, the memtype APIs - so rename it to memtype.c.

- pageattr.c is offering, primarily, the set_memory*() page attribute APIs,
  which is offered via the <asm/set_memory.h> header: name the .c file
  along the same pattern.

I.e. perform these renames, and move them all next to each other in arch/x86/mm/pat/:

    pat.c             => memtype.c
    pat_internal.h    => memtype.h
    pat_interval.c    => memtype_interval.c

    pageattr.c        => set_memory.c
    pageattr-test.c   => cpa-test.c

Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/mm/Makefile

@@ -12,8 +12,10 @@ CFLAGS_REMOVE_mem_encrypt.o		= -pg
 CFLAGS_REMOVE_mem_encrypt_identity.o	= -pg
 endif
 
-obj-y	:=  init.o init_$(BITS).o fault.o ioremap.o extable.o pageattr.o mmap.o \
-	    pat.o pgtable.o physaddr.o setup_nx.o tlb.o cpu_entry_area.o maccess.o
+obj-y				:=  init.o init_$(BITS).o fault.o ioremap.o extable.o mmap.o \
+				    pgtable.o physaddr.o setup_nx.o tlb.o cpu_entry_area.o maccess.o
+
+obj-y				+= pat/
 
 # Make sure __phys_addr has no stackprotector
 nostackp := $(call cc-option, -fno-stack-protector)
@@ -23,8 +25,6 @@ CFLAGS_mem_encrypt_identity.o	:= $(nostackp)
 
 CFLAGS_fault.o := -I $(srctree)/$(src)/../include/asm/trace
 
-obj-$(CONFIG_X86_PAT)		+= pat_interval.o
-
 obj-$(CONFIG_X86_32)		+= pgtable_32.o iomap_32.o
 
 obj-$(CONFIG_HUGETLB_PAGE)	+= hugetlbpage.o

arch/x86/mm/pat/Makefile

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-y				:= set_memory.o memtype.o
+
+obj-$(CONFIG_X86_PAT)		+= memtype_interval.o

arch/x86/mm/pat/memtype.c

@@ -55,8 +55,8 @@
 #include <asm/pat.h>
 #include <asm/io.h>
 
-#include "pat_internal.h"
-#include "mm_internal.h"
+#include "memtype.h"
+#include "../mm_internal.h"
 
 #undef pr_fmt
 #define pr_fmt(fmt) "" fmt

arch/x86/mm/pat/memtype.h

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __PAT_INTERNAL_H_
-#define __PAT_INTERNAL_H_
+#ifndef __MEMTYPE_H_
+#define __MEMTYPE_H_
 
 extern int pat_debug_enable;
 
@@ -46,4 +46,4 @@ static inline int memtype_copy_nth_element(struct memtype *out, loff_t pos)
 { return 0; }
 #endif
 
-#endif /* __PAT_INTERNAL_H_ */
+#endif /* __MEMTYPE_H_ */

arch/x86/mm/pat/memtype_interval.c

@@ -18,7 +18,7 @@
 #include <asm/pgtable.h>
 #include <asm/pat.h>
 
-#include "pat_internal.h"
+#include "memtype.h"
 
 /*
  * The memtype tree keeps track of memory type for specific

arch/x86/mm/pat/set_memory.c

@@ -27,7 +27,7 @@
 #include <asm/pat.h>
 #include <asm/set_memory.h>
 
-#include "mm_internal.h"
+#include "../mm_internal.h"
 
 /*
  * The current flushing context - we pass it instead of 5 arguments:
@@ -2281,5 +2281,5 @@ int __init kernel_unmap_pages_in_pgd(pgd_t *pgd, unsigned long address,
  * be exposed to the rest of the kernel. Include these directly here.
  */
 #ifdef CONFIG_CPA_DEBUG
-#include "pageattr-test.c"
+#include "cpa-test.c"
 #endif