linux-kernel - [RFC V1 13/31] mm/mmap: Drop arch_vm_get_page

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Date:   Mon, 24 Jan 2022 18:26:50 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     linux-mm@...ck.org
Cc:     linux-kernel@...r.kernel.org, hch@...radead.org,
        akpm@...ux-foundation.org,
        Anshuman Khandual <anshuman.khandual@....com>
Subject: [RFC V1 13/31] mm/mmap: Drop arch_vm_get_page_pgprot()

There are no platforms left which use arch_vm_get_page_prot(). Just drop
arch_vm_get_page_prot() construct and simplify remaining code.

Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
---
 include/linux/mman.h |  4 ----
 mm/mmap.c            | 10 +---------
 2 files changed, 1 insertion(+), 13 deletions(-)

diff --git a/include/linux/mman.h b/include/linux/mman.h
index b66e91b8176c..58b3abd457a3 100644
--- a/include/linux/mman.h
+++ b/include/linux/mman.h
@@ -93,10 +93,6 @@ static inline void vm_unacct_memory(long pages)
 #define arch_calc_vm_flag_bits(flags) 0
 #endif
 
-#ifndef arch_vm_get_page_prot
-#define arch_vm_get_page_prot(vm_flags) __pgprot(0)
-#endif
-
 #ifndef arch_validate_prot
 /*
  * This is called from mprotect().  PROT_GROWSDOWN and PROT_GROWSUP have
diff --git a/mm/mmap.c b/mm/mmap.c
index 70a75ea91e94..2fc597cf8b8d 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -102,7 +102,7 @@ static void unmap_region(struct mm_struct *mm,
  *								w: (no) no
  *								x: (yes) yes
  */
-static inline pgprot_t __vm_get_page_prot(unsigned long vm_flags)
+pgprot_t vm_get_page_prot(unsigned long vm_flags)
 {
 	switch (vm_flags & (VM_READ | VM_WRITE | VM_EXEC | VM_SHARED)) {
 	case VM_NONE:
@@ -141,14 +141,6 @@ static inline pgprot_t __vm_get_page_prot(unsigned long vm_flags)
 		BUILD_BUG();
 	}
 }
-
-pgprot_t vm_get_page_prot(unsigned long vm_flags)
-{
-	pgprot_t ret = __pgprot(pgprot_val(__vm_get_page_prot(vm_flags)) |
-			pgprot_val(arch_vm_get_page_prot(vm_flags)));
-
-	return ret;
-}
 EXPORT_SYMBOL(vm_get_page_prot);
 #endif	/* CONFIG_ARCH_HAS_VM_GET_PAGE_PROT */
 
-- 
2.25.1