arch: Move page table config macros out of #ifndef __ASSEMBLY__ con…

…dition

Move page table configuration macros like `P4D_SHIFT` out of
`#ifndef __ASSEMBLY__` condition, so that they can be used by assembly
code or linker scripts.  For example, the `TEXT_CFI_JT` macro in
`include/asm-generic/vmlinux.lds.h` needs `PMD_SIZE` when Clang CFI is
enabled.

Signed-off-by: Wende Tan <twd2.me@gmail.com>

include/asm-generic/pgtable-nop4d.h

@@ -2,17 +2,19 @@
 #ifndef _PGTABLE_NOP4D_H
 #define _PGTABLE_NOP4D_H
 
-#ifndef __ASSEMBLY__
+#include <linux/const.h>
 
 #define __PAGETABLE_P4D_FOLDED 1
 
-typedef struct { pgd_t pgd; } p4d_t;
-
 #define P4D_SHIFT		PGDIR_SHIFT
 #define PTRS_PER_P4D		1
-#define P4D_SIZE		(1UL << P4D_SHIFT)
+#define P4D_SIZE		(_UL(1) << P4D_SHIFT)
 #define P4D_MASK		(~(P4D_SIZE-1))
 
+#ifndef __ASSEMBLY__
+
+typedef struct { pgd_t pgd; } p4d_t;
+
 /*
  * The "pgd_xxx()" functions here are trivial for a folded two-level
  * setup: the p4d is never bad, and a p4d always exists (as it's folded

include/asm-generic/pgtable-nopmd.h

@@ -2,26 +2,27 @@
 #ifndef _PGTABLE_NOPMD_H
 #define _PGTABLE_NOPMD_H
 
-#ifndef __ASSEMBLY__
-
 #include <asm-generic/pgtable-nopud.h>
-
-struct mm_struct;
+#include <linux/const.h>
 
 #define __PAGETABLE_PMD_FOLDED 1
 
+#define PMD_SHIFT	PUD_SHIFT
+#define PTRS_PER_PMD	1
+#define PMD_SIZE  	(_UL(1) << PMD_SHIFT)
+#define PMD_MASK  	(~(PMD_SIZE-1))
+
+#ifndef __ASSEMBLY__
+
+struct mm_struct;
+
 /*
  * Having the pmd type consist of a pud gets the size right, and allows
  * us to conceptually access the pud entry that this pmd is folded into
  * without casting.
  */
 typedef struct { pud_t pud; } pmd_t;
 
-#define PMD_SHIFT	PUD_SHIFT
-#define PTRS_PER_PMD	1
-#define PMD_SIZE  	(1UL << PMD_SHIFT)
-#define PMD_MASK  	(~(PMD_SIZE-1))
-
 /*
  * The "pud_xxx()" functions here are trivial for a folded two-level
  * setup: the pmd is never bad, and a pmd always exists (as it's folded

include/asm-generic/pgtable-nopud.h

@@ -2,24 +2,25 @@
 #ifndef _PGTABLE_NOPUD_H
 #define _PGTABLE_NOPUD_H
 
-#ifndef __ASSEMBLY__
-
 #include <asm-generic/pgtable-nop4d.h>
+#include <linux/const.h>
 
 #define __PAGETABLE_PUD_FOLDED 1
 
+#define PUD_SHIFT	P4D_SHIFT
+#define PTRS_PER_PUD	1
+#define PUD_SIZE  	(_UL(1) << PUD_SHIFT)
+#define PUD_MASK  	(~(PUD_SIZE-1))
+
+#ifndef __ASSEMBLY__
+
 /*
  * Having the pud type consist of a p4d gets the size right, and allows
  * us to conceptually access the p4d entry that this pud is folded into
  * without casting.
  */
 typedef struct { p4d_t p4d; } pud_t;
 
-#define PUD_SHIFT	P4D_SHIFT
-#define PTRS_PER_PUD	1
-#define PUD_SIZE  	(1UL << PUD_SHIFT)
-#define PUD_MASK  	(~(PUD_SIZE-1))
-
 /*
  * The "p4d_xxx()" functions here are trivial for a folded two-level
  * setup: the pud is never bad, and a pud always exists (as it's folded