+ nds32-mm-enable-arch_has_vm_get_page_prot.patch added to -mm tree

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The patch titled
     Subject: nds32/mm: enable ARCH_HAS_VM_GET_PAGE_PROT
has been added to the -mm tree.  Its filename is
     nds32-mm-enable-arch_has_vm_get_page_prot.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/nds32-mm-enable-arch_has_vm_get_page_prot.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/nds32-mm-enable-arch_has_vm_get_page_prot.patch

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------------------------------------------------------
From: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Subject: nds32/mm: enable ARCH_HAS_VM_GET_PAGE_PROT

This defines and exports a platform specific custom vm_get_page_prot() via
subscribing ARCH_HAS_VM_GET_PAGE_PROT.  Subsequently all __SXXX and __PXXX
macros can be dropped which are no longer needed.

Link: https://lkml.kernel.org/r/1645425519-9034-28-git-send-email-anshuman.khandual@xxxxxxx
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Cc: Nick Hu <nickhu@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 arch/nds32/Kconfig               |    1 
 arch/nds32/include/asm/pgtable.h |   17 -------------
 arch/nds32/mm/mmap.c             |   37 +++++++++++++++++++++++++++++
 3 files changed, 38 insertions(+), 17 deletions(-)

--- a/arch/nds32/include/asm/pgtable.h~nds32-mm-enable-arch_has_vm_get_page_prot
+++ a/arch/nds32/include/asm/pgtable.h
@@ -152,23 +152,6 @@ extern void __pgd_error(const char *file
 #endif /* __ASSEMBLY__ */
 
 /*         xwr */
-#define __P000  (PAGE_NONE | _PAGE_CACHE_SHRD)
-#define __P001  (PAGE_READ | _PAGE_CACHE_SHRD)
-#define __P010  (PAGE_COPY | _PAGE_CACHE_SHRD)
-#define __P011  (PAGE_COPY | _PAGE_CACHE_SHRD)
-#define __P100  (PAGE_EXEC | _PAGE_CACHE_SHRD)
-#define __P101  (PAGE_READ | _PAGE_E | _PAGE_CACHE_SHRD)
-#define __P110  (PAGE_COPY | _PAGE_E | _PAGE_CACHE_SHRD)
-#define __P111  (PAGE_COPY | _PAGE_E | _PAGE_CACHE_SHRD)
-
-#define __S000  (PAGE_NONE | _PAGE_CACHE_SHRD)
-#define __S001  (PAGE_READ | _PAGE_CACHE_SHRD)
-#define __S010  (PAGE_RDWR | _PAGE_CACHE_SHRD)
-#define __S011  (PAGE_RDWR | _PAGE_CACHE_SHRD)
-#define __S100  (PAGE_EXEC | _PAGE_CACHE_SHRD)
-#define __S101  (PAGE_READ | _PAGE_E | _PAGE_CACHE_SHRD)
-#define __S110  (PAGE_RDWR | _PAGE_E | _PAGE_CACHE_SHRD)
-#define __S111  (PAGE_RDWR | _PAGE_E | _PAGE_CACHE_SHRD)
 
 #ifndef __ASSEMBLY__
 /*
--- a/arch/nds32/Kconfig~nds32-mm-enable-arch_has_vm_get_page_prot
+++ a/arch/nds32/Kconfig
@@ -10,6 +10,7 @@ config NDS32
 	select ARCH_HAS_DMA_PREP_COHERENT
 	select ARCH_HAS_SYNC_DMA_FOR_CPU
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
+	select ARCH_HAS_VM_GET_PAGE_PROT
 	select ARCH_WANT_FRAME_POINTERS if FTRACE
 	select CLKSRC_MMIO
 	select CLONE_BACKWARDS
--- a/arch/nds32/mm/mmap.c~nds32-mm-enable-arch_has_vm_get_page_prot
+++ a/arch/nds32/mm/mmap.c
@@ -71,3 +71,40 @@ arch_get_unmapped_area(struct file *filp
 	info.align_offset = pgoff << PAGE_SHIFT;
 	return vm_unmapped_area(&info);
 }
+
+pgprot_t vm_get_page_prot(unsigned long vm_flags)
+{
+	switch (vm_flags & (VM_READ | VM_WRITE | VM_EXEC | VM_SHARED)) {
+	case VM_NONE:
+		return (PAGE_NONE | _PAGE_CACHE_SHRD);
+	case VM_READ:
+		return (PAGE_READ | _PAGE_CACHE_SHRD);
+	case VM_WRITE:
+	case VM_WRITE | VM_READ:
+		return (PAGE_COPY | _PAGE_CACHE_SHRD);
+	case VM_EXEC:
+		return (PAGE_EXEC | _PAGE_CACHE_SHRD);
+	case VM_EXEC | VM_READ:
+		return (PAGE_READ | _PAGE_E | _PAGE_CACHE_SHRD);
+	case VM_EXEC | VM_WRITE:
+	case VM_EXEC | VM_WRITE | VM_READ:
+		return (PAGE_COPY | _PAGE_E | _PAGE_CACHE_SHRD);
+	case VM_SHARED:
+		return (PAGE_NONE | _PAGE_CACHE_SHRD);
+	case VM_SHARED | VM_READ:
+		return (PAGE_READ | _PAGE_CACHE_SHRD);
+	case VM_SHARED | VM_WRITE:
+	case VM_SHARED | VM_WRITE | VM_READ:
+		return (PAGE_RDWR | _PAGE_CACHE_SHRD);
+	case VM_SHARED | VM_EXEC:
+		return (PAGE_EXEC | _PAGE_CACHE_SHRD);
+	case VM_SHARED | VM_EXEC | VM_READ:
+		return (PAGE_READ | _PAGE_E | _PAGE_CACHE_SHRD);
+	case VM_SHARED | VM_EXEC | VM_WRITE:
+	case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ:
+		return (PAGE_RDWR | _PAGE_E | _PAGE_CACHE_SHRD);
+	default:
+		BUILD_BUG();
+	}
+}
+EXPORT_SYMBOL(vm_get_page_prot);
_

Patches currently in -mm which might be from anshuman.khandual@xxxxxxx are

mm-generalize-arch_has_filter_pgprot.patch
mm-merge-pte_mkhuge-call-into-arch_make_huge_pte.patch
mm-debug_vm_pgtable-drop-protection_map-usage.patch
mm-mmap-clarify-protection_map-indices.patch
mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch
powerpc-mm-enable-arch_has_vm_get_page_prot.patch
arm64-mm-enable-arch_has_vm_get_page_prot.patch
sparc-mm-enable-arch_has_vm_get_page_prot.patch
mips-mm-enable-arch_has_vm_get_page_prot.patch
m68k-mm-enable-arch_has_vm_get_page_prot.patch
arm-mm-enable-arch_has_vm_get_page_prot.patch
mm-mmap-drop-protection_map.patch
mm-mmap-drop-arch_filter_pgprot.patch
mm-mmap-drop-arch_vm_get_page_pgprot.patch
s390-mm-enable-arch_has_vm_get_page_prot.patch
riscv-mm-enable-arch_has_vm_get_page_prot.patch
alpha-mm-enable-arch_has_vm_get_page_prot.patch
sh-mm-enable-arch_has_vm_get_page_prot.patch
arc-mm-enable-arch_has_vm_get_page_prot.patch
csky-mm-enable-arch_has_vm_get_page_prot.patch
extensa-mm-enable-arch_has_vm_get_page_prot.patch
parisc-mm-enable-arch_has_vm_get_page_prot.patch
openrisc-mm-enable-arch_has_vm_get_page_prot.patch
um-mm-enable-arch_has_vm_get_page_prot.patch
microblaze-mm-enable-arch_has_vm_get_page_prot.patch
nios2-mm-enable-arch_has_vm_get_page_prot.patch
hexagon-mm-enable-arch_has_vm_get_page_prot.patch
nds32-mm-enable-arch_has_vm_get_page_prot.patch
ia64-mm-enable-arch_has_vm_get_page_prot.patch
mm-mmap-drop-generic-vm_get_page_prot.patch
mm-mmap-drop-arch_has_vm_get_page_prot.patch
mm-hugetlb-generalize-arch_want_general_hugetlb.patch
mm-migration-add-trace-events-for-thp-migrations.patch
mm-migration-add-trace-events-for-base-page-and-hugetlb-migrations.patch




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