linux-kernel - [PATCH] um, pkeys: give UML an arch_vma_access

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Message-Id: <20160218183557.AE1DB383@viggo.jf.intel.com>
Date:	Thu, 18 Feb 2016 10:35:57 -0800
From:	Dave Hansen <dave@...1.net>
To:	linux-kernel@...r.kernel.org
Cc:	linux-mm@...ck.org, x86@...nel.org, Dave Hansen <dave@...1.net>,
	dave.hansen@...ux.intel.com
Subject: [PATCH] um, pkeys: give UML an arch_vma_access_permitted()


From: Dave Hansen <dave.hansen@...ux.intel.com>

UML has a special mmu_context.h and needs updates whenever the generic one
is updated.  The original pkeys patches missed this.  This fixes it up.

Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
---

 b/arch/um/include/asm/mmu_context.h |   14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff -puN arch/um/include/asm/mmu_context.h~pkeys-fix-um-arch_vma_access_permitted arch/um/include/asm/mmu_context.h
--- a/arch/um/include/asm/mmu_context.h~pkeys-fix-um-arch_vma_access_permitted	2016-02-18 10:19:17.675287570 -0800
+++ b/arch/um/include/asm/mmu_context.h	2016-02-18 10:20:09.214627363 -0800
@@ -27,6 +27,20 @@ static inline void arch_bprm_mm_init(str
 				     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
  */
_