[PATCH V3 29/30] mm/mmap: Drop generic vm_get_page_prot()

Anshuman Khandual
2022-02-28T10:55:26Z

All available platforms export their own vm_get_page_prot() implementation
via ARCH_HAS_VM_GET_PAGE_PROT. Hence a generic implementation is no longer
needed.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
mm/mmap.c | 40 ----------------------------------------
1 file changed, 40 deletions(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index c13dd9c37866..ff343f76a825 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -102,46 +102,6 @@ static void unmap_region(struct mm_struct *mm,
* w: (no) no
* x: (yes) yes
*/
-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 __P000;
- case VM_READ:
- return __P001;
- case VM_WRITE:
- return __P010;
- case VM_READ | VM_WRITE:
- return __P011;
- case VM_EXEC:
- return __P100;
- case VM_EXEC | VM_READ:
- return __P101;
- case VM_EXEC | VM_WRITE:
- return __P110;
- case VM_EXEC | VM_READ | VM_WRITE:
- return __P111;
- case VM_SHARED:
- return __S000;
- case VM_SHARED | VM_READ:
- return __S001;
- case VM_SHARED | VM_WRITE:
- return __S010;
- case VM_SHARED | VM_READ | VM_WRITE:
- return __S011;
- case VM_SHARED | VM_EXEC:
- return __S100;
- case VM_SHARED | VM_EXEC | VM_READ:
- return __S101;
- case VM_SHARED | VM_EXEC | VM_WRITE:
- return __S110;
- case VM_SHARED | VM_EXEC | VM_READ | VM_WRITE:
- return __S111;
- default:
- BUILD_BUG();
- }
-}
-EXPORT_SYMBOL(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