linux-kernel - [tip:mm/pkeys] um, pkeys: Add UML arch_*_access

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Message-ID: <tip-9d95b1759e0504890049deb2de62e31d7c241c30@git.kernel.org>
Date:	Thu, 18 Feb 2016 12:22:38 -0800
From:	tip-bot for Dave Hansen <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	mingo@...nel.org, richard@....at, torvalds@...ux-foundation.org,
	tglx@...utronix.de, hpa@...or.com, dave.hansen@...ux.intel.com,
	linux-kernel@...r.kernel.org, jdike@...toit.com, dave@...1.net,
	peterz@...radead.org
Subject: [tip:mm/pkeys] um, pkeys: Add UML arch_*_access_permitted()
  methods

Commit-ID:  9d95b1759e0504890049deb2de62e31d7c241c30
Gitweb:     http://git.kernel.org/tip/9d95b1759e0504890049deb2de62e31d7c241c30
Author:     Dave Hansen <dave.hansen@...ux.intel.com>
AuthorDate: Thu, 18 Feb 2016 10:35:57 -0800
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Thu, 18 Feb 2016 19:46:28 +0100

um, pkeys: Add UML arch_*_access_permitted() methods

UML has a special mmu_context.h and needs updates whenever the generic one
is updated.

Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Dave Hansen <dave@...1.net>
Cc: Jeff Dike <jdike@...toit.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Richard Weinberger <richard@....at>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-kernel@...r.kernel.org
Cc: linux-mm@...ck.org
Cc: user-mode-linux-devel@...ts.sourceforge.net
Cc: user-mode-linux-user@...ts.sourceforge.net
Link: http://lkml.kernel.org/r/20160218183557.AE1DB383@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/um/include/asm/mmu_context.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/um/include/asm/mmu_context.h b/arch/um/include/asm/mmu_context.h
index 941527e..1a60e13 100644
--- a/arch/um/include/asm/mmu_context.h
+++ b/arch/um/include/asm/mmu_context.h
@@ -27,6 +27,20 @@ static inline void arch_bprm_mm_init(struct mm_struct *mm,
 				     struct vm_area_struct *vma)
 {
 }
+
+static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
+		bool write, bool execute, bool foreign)
+{
+	/* by default, allow everything */
+	return true;
+}
+
+static inline bool arch_pte_access_permitted(pte_t pte, bool write)
+{
+	/* by default, allow everything */
+	return true;
+}
+
 /*
  * end asm-generic/mm_hooks.h functions
  */