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Message-Id: <1425575884-2574-22-git-send-email-aarcange@redhat.com>
Date: Thu, 5 Mar 2015 18:18:04 +0100
From: Andrea Arcangeli <aarcange@...hat.com>
To: qemu-devel@...gnu.org, kvm@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-mm@...ck.org,
linux-api@...r.kernel.org,
Android Kernel Team <kernel-team@...roid.com>
Cc: "Kirill A. Shutemov" <kirill@...temov.name>,
Pavel Emelyanov <xemul@...allels.com>,
Sanidhya Kashyap <sanidhya.gatech@...il.com>,
zhang.zhanghailiang@...wei.com,
Linus Torvalds <torvalds@...ux-foundation.org>,
Andres Lagar-Cavilla <andreslc@...gle.com>,
Dave Hansen <dave@...1.net>,
Paolo Bonzini <pbonzini@...hat.com>,
Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
Andy Lutomirski <luto@...capital.net>,
Andrew Morton <akpm@...ux-foundation.org>,
Sasha Levin <sasha.levin@...cle.com>,
Hugh Dickins <hughd@...gle.com>,
Peter Feiner <pfeiner@...gle.com>,
"Dr. David Alan Gilbert" <dgilbert@...hat.com>,
Christopher Covington <cov@...eaurora.org>,
Johannes Weiner <hannes@...xchg.org>,
Robert Love <rlove@...gle.com>,
Dmitry Adamushko <dmitry.adamushko@...il.com>,
Neil Brown <neilb@...e.de>, Mike Hommey <mh@...ndium.org>,
Taras Glek <tglek@...illa.com>, Jan Kara <jack@...e.cz>,
KOSAKI Motohiro <kosaki.motohiro@...il.com>,
Michel Lespinasse <walken@...gle.com>,
Minchan Kim <minchan@...nel.org>,
Keith Packard <keithp@...thp.com>,
"Huangpeng (Peter)" <peter.huangpeng@...wei.com>,
Anthony Liguori <anthony@...emonkey.ws>,
Stefan Hajnoczi <stefanha@...il.com>,
Wenchao Xia <wenchaoqemu@...il.com>,
Andrew Jones <drjones@...hat.com>,
Juan Quintela <quintela@...hat.com>
Subject: [PATCH 21/21] userfaultfd: add userfaultfd_wp mm helpers
These helpers will be used to know if to call handle_userfault() during
wrprotect faults in order to deliver the wrprotect faults to userland.
Signed-off-by: Andrea Arcangeli <aarcange@...hat.com>
---
include/linux/userfaultfd_k.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h
index 3c39a4f..81f0d11 100644
--- a/include/linux/userfaultfd_k.h
+++ b/include/linux/userfaultfd_k.h
@@ -65,6 +65,11 @@ static inline bool userfaultfd_missing(struct vm_area_struct *vma)
return vma->vm_flags & VM_UFFD_MISSING;
}
+static inline bool userfaultfd_wp(struct vm_area_struct *vma)
+{
+ return vma->vm_flags & VM_UFFD_WP;
+}
+
static inline bool userfaultfd_armed(struct vm_area_struct *vma)
{
return vma->vm_flags & (VM_UFFD_MISSING | VM_UFFD_WP);
@@ -92,6 +97,11 @@ static inline bool userfaultfd_missing(struct vm_area_struct *vma)
return false;
}
+static inline bool userfaultfd_wp(struct vm_area_struct *vma)
+{
+ return false;
+}
+
static inline bool userfaultfd_armed(struct vm_area_struct *vma)
{
return false;
--
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