[tip:mm/pkeys] um, pkeys: Add UML arch_*_access_permitted() methods

[tip-bot for Dave Hansen]

Commit-ID:  9d95b1759e0504890049deb2de62e31d7c241c30
Gitweb:     http://git.kernel.org/tip/9d95b1759e0504890049deb2de62e31d7c241c30
Author:     Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
AuthorDate: Thu, 18 Feb 2016 10:35:57 -0800
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
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@xxxxxxxxxxxxxxx>
Cc: Dave Hansen <dave@xxxxxxxx>
Cc: Jeff Dike <jdike@xxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Richard Weinberger <richard@xxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-mm@xxxxxxxxx
Cc: user-mode-linux-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: user-mode-linux-user@xxxxxxxxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/20160218183557.AE1DB383@xxxxxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 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
  */