This just converts the generic vm_get_page_prot() implementation into a new
macro i.e DECLARE_VM_GET_PAGE_PROT which later can be used across platforms
when enabling them with ARCH_HAS_VM_GET_PAGE_PROT. This does not create any
functional change.
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: linux-mm@xxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Suggested-by: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
---
include/linux/mm.h | 8 ++++++++
mm/mmap.c | 6 +-----
2 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 47bfe038d46e..237828c2bae2 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -428,6 +428,14 @@ extern unsigned int kobjsize(const void *objp);
extern pgprot_t protection_map[16];
#endif
+#define DECLARE_VM_GET_PAGE_PROT \
+pgprot_t vm_get_page_prot(unsigned long vm_flags) \
+{ \
+ return protection_map[vm_flags & \
+ (VM_READ | VM_WRITE | VM_EXEC | VM_SHARED)]; \
+} \
+EXPORT_SYMBOL(vm_get_page_prot);
+
/*
* The default fault flags that should be used by most of the
* arch-specific page fault handlers.
diff --git a/mm/mmap.c b/mm/mmap.c
index b01f0280bda2..55c30aee3999 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -123,11 +123,7 @@ pgprot_t protection_map[16] __ro_after_init = {
#endif
#ifndef CONFIG_ARCH_HAS_VM_GET_PAGE_PROT
-pgprot_t vm_get_page_prot(unsigned long vm_flags)
-{
- return protection_map[vm_flags & (VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)];
-}
-EXPORT_SYMBOL(vm_get_page_prot);
+DECLARE_VM_GET_PAGE_PROT
#endif /* CONFIG_ARCH_HAS_VM_GET_PAGE_PROT */
static pgprot_t vm_pgprot_modify(pgprot_t oldprot, unsigned long vm_flags)
--
2.25.1
