linux-kernel - [RFC V1 12/31] mm/mmap: Drop arch_filter

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1643029028-12710-13-git-send-email-anshuman.khandual@arm.com>
Date:   Mon, 24 Jan 2022 18:26:49 +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 12/31] mm/mmap: Drop arch_filter_pgprot()

There are no platforms left which subscribe ARCH_HAS_FILTER_PGPROT. Hence
just drop arch_filter_pgprot() and also the config ARCH_HAS_FILTER_PGPROT.

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>
---
 mm/Kconfig |  3 ---
 mm/mmap.c  | 10 +---------
 2 files changed, 1 insertion(+), 12 deletions(-)

diff --git a/mm/Kconfig b/mm/Kconfig
index fa436478a94c..212fb6e1ddaa 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -744,9 +744,6 @@ config IDLE_PAGE_TRACKING
 config ARCH_HAS_CACHE_LINE_SIZE
 	bool
 
-config ARCH_HAS_FILTER_PGPROT
-	bool
-
 config ARCH_HAS_VM_GET_PAGE_PROT
 	bool
 
diff --git a/mm/mmap.c b/mm/mmap.c
index f61f74a61f62..70a75ea91e94 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -102,14 +102,6 @@ static void unmap_region(struct mm_struct *mm,
  *								w: (no) no
  *								x: (yes) yes
  */
-
-#ifndef CONFIG_ARCH_HAS_FILTER_PGPROT
-static inline pgprot_t arch_filter_pgprot(pgprot_t prot)
-{
-	return prot;
-}
-#endif
-
 static inline pgprot_t __vm_get_page_prot(unsigned long vm_flags)
 {
 	switch (vm_flags & (VM_READ | VM_WRITE | VM_EXEC | VM_SHARED)) {
@@ -155,7 +147,7 @@ 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 arch_filter_pgprot(ret);
+	return ret;
 }
 EXPORT_SYMBOL(vm_get_page_prot);
 #endif	/* CONFIG_ARCH_HAS_VM_GET_PAGE_PROT */
-- 
2.25.1