From: Dave Hansen <dave.hansen@linux.intel.com>
The vmalloc() code needs to know when to propagate changes to across
mms because the rules differ based on architecture and kernel config.
It does this with a bitmap: ARCH_PAGE_TABLE_SYNC_MASK which tells
vmalloc when to call back in to arch-specific code to propagate
page table changes.
The 32-bit x86 rules are less exciting now and are unified across
PAE (3-level) and 2-level paging so the two for their constants
define the same value.
Move the common value to the common pgtable_32_types.h.
Suggested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
---
b/arch/x86/include/asm/pgtable-2level_types.h | 2 --
b/arch/x86/include/asm/pgtable-3level_types.h | 2 --
b/arch/x86/include/asm/pgtable_32_types.h | 2 ++
3 files changed, 2 insertions(+), 4 deletions(-)
diff -puN arch/x86/include/asm/pgtable-2level_types.h~move-ARCH_PAGE_TABLE_SYNC_MASK arch/x86/include/asm/pgtable-2level_types.h
--- a/arch/x86/include/asm/pgtable-2level_types.h~move-ARCH_PAGE_TABLE_SYNC_MASK 2025-04-18 08:37:32.631950373 -0700
+++ b/arch/x86/include/asm/pgtable-2level_types.h 2025-04-18 08:37:32.640950703 -0700
@@ -18,8 +18,6 @@ typedef union {
} pte_t;
#endif /* !__ASSEMBLER__ */
-#define ARCH_PAGE_TABLE_SYNC_MASK PGTBL_PMD_MODIFIED
-
/*
* Traditional i386 two-level paging structure:
*/
diff -puN arch/x86/include/asm/pgtable_32_types.h~move-ARCH_PAGE_TABLE_SYNC_MASK arch/x86/include/asm/pgtable_32_types.h
--- a/arch/x86/include/asm/pgtable_32_types.h~move-ARCH_PAGE_TABLE_SYNC_MASK 2025-04-18 08:37:32.635950520 -0700
+++ b/arch/x86/include/asm/pgtable_32_types.h 2025-04-18 08:37:32.640950703 -0700
@@ -20,4 +20,6 @@
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE - 1))
+#define ARCH_PAGE_TABLE_SYNC_MASK PGTBL_PMD_MODIFIED
+
#endif /* _ASM_X86_PGTABLE_32_TYPES_H */
diff -puN arch/x86/include/asm/pgtable-3level_types.h~move-ARCH_PAGE_TABLE_SYNC_MASK arch/x86/include/asm/pgtable-3level_types.h
--- a/arch/x86/include/asm/pgtable-3level_types.h~move-ARCH_PAGE_TABLE_SYNC_MASK 2025-04-18 08:37:32.637950593 -0700
+++ b/arch/x86/include/asm/pgtable-3level_types.h 2025-04-18 08:37:32.640950703 -0700
@@ -27,8 +27,6 @@ typedef union {
} pmd_t;
#endif /* !__ASSEMBLER__ */
-#define ARCH_PAGE_TABLE_SYNC_MASK PGTBL_PMD_MODIFIED
-
/*
* PGDIR_SHIFT determines what a top-level page table entry can map
*/
_