The patch titled
Subject: userfaultfd: linux/userfaultfd_k.h
has been removed from the -mm tree. Its filename was
userfaultfd-linux-userfaultfd_kh.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Subject: userfaultfd: linux/userfaultfd_k.h
Kernel header defining the methods needed by the VM common code to
interact with the userfaultfd.
Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Acked-by: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
Cc: Sanidhya Kashyap <sanidhya.gatech@xxxxxxxxx>
Cc: zhang.zhanghailiang@xxxxxxxxxx
Cc: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Cc: Andres Lagar-Cavilla <andreslc@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Peter Feiner <pfeiner@xxxxxxxxxx>
Cc: "Dr. David Alan Gilbert" <dgilbert@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: "Huangpeng (Peter)" <peter.huangpeng@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/userfaultfd_k.h | 79 ++++++++++++++++++++++++++++++++
1 file changed, 79 insertions(+)
diff -puN /dev/null include/linux/userfaultfd_k.h
--- /dev/null
+++ a/include/linux/userfaultfd_k.h
@@ -0,0 +1,79 @@
+/*
+ * include/linux/userfaultfd_k.h
+ *
+ * Copyright (C) 2015 Red Hat, Inc.
+ *
+ */
+
+#ifndef _LINUX_USERFAULTFD_K_H
+#define _LINUX_USERFAULTFD_K_H
+
+#ifdef CONFIG_USERFAULTFD
+
+#include <linux/userfaultfd.h> /* linux/include/uapi/linux/userfaultfd.h */
+
+#include <linux/fcntl.h>
+
+/*
+ * CAREFUL: Check include/uapi/asm-generic/fcntl.h when defining
+ * new flags, since they might collide with O_* ones. We want
+ * to re-use O_* flags that couldn't possibly have a meaning
+ * from userfaultfd, in order to leave a free define-space for
+ * shared O_* flags.
+ */
+#define UFFD_CLOEXEC O_CLOEXEC
+#define UFFD_NONBLOCK O_NONBLOCK
+
+#define UFFD_SHARED_FCNTL_FLAGS (O_CLOEXEC | O_NONBLOCK)
+#define UFFD_FLAGS_SET (EFD_SHARED_FCNTL_FLAGS)
+
+extern int handle_userfault(struct vm_area_struct *vma, unsigned long address,
+ unsigned int flags, unsigned long reason);
+
+/* mm helpers */
+static inline bool is_mergeable_vm_userfaultfd_ctx(struct vm_area_struct *vma,
+ struct vm_userfaultfd_ctx vm_ctx)
+{
+ return vma->vm_userfaultfd_ctx.ctx == vm_ctx.ctx;
+}
+
+static inline bool userfaultfd_missing(struct vm_area_struct *vma)
+{
+ return vma->vm_flags & VM_UFFD_MISSING;
+}
+
+static inline bool userfaultfd_armed(struct vm_area_struct *vma)
+{
+ return vma->vm_flags & (VM_UFFD_MISSING | VM_UFFD_WP);
+}
+
+#else /* CONFIG_USERFAULTFD */
+
+/* mm helpers */
+static inline int handle_userfault(struct vm_area_struct *vma,
+ unsigned long address,
+ unsigned int flags,
+ unsigned long reason)
+{
+ return VM_FAULT_SIGBUS;
+}
+
+static inline bool is_mergeable_vm_userfaultfd_ctx(struct vm_area_struct *vma,
+ struct vm_userfaultfd_ctx vm_ctx)
+{
+ return true;
+}
+
+static inline bool userfaultfd_missing(struct vm_area_struct *vma)
+{
+ return false;
+}
+
+static inline bool userfaultfd_armed(struct vm_area_struct *vma)
+{
+ return false;
+}
+
+#endif /* CONFIG_USERFAULTFD */
+
+#endif /* _LINUX_USERFAULTFD_K_H */
_
Patches currently in -mm which might be from aarcange@xxxxxxxxxx are
userfaultfd-selftest-update-userfaultfd-x86-32bit-syscall-number.patch
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