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Message-Id: <1431624680-20153-19-git-send-email-aarcange@redhat.com>
Date: Thu, 14 May 2015 19:31:15 +0200
From: Andrea Arcangeli <aarcange@...hat.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
linux-kernel@...r.kernel.org, linux-mm@...ck.org,
qemu-devel@...gnu.org, kvm@...r.kernel.org,
linux-api@...r.kernel.org
Cc: Pavel Emelyanov <xemul@...allels.com>,
Sanidhya Kashyap <sanidhya.gatech@...il.com>,
zhang.zhanghailiang@...wei.com,
Linus Torvalds <torvalds@...ux-foundation.org>,
"Kirill A. Shutemov" <kirill@...temov.name>,
Andres Lagar-Cavilla <andreslc@...gle.com>,
Dave Hansen <dave.hansen@...el.com>,
Paolo Bonzini <pbonzini@...hat.com>,
Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
Andy Lutomirski <luto@...capital.net>,
Hugh Dickins <hughd@...gle.com>,
Peter Feiner <pfeiner@...gle.com>,
"Dr. David Alan Gilbert" <dgilbert@...hat.com>,
Johannes Weiner <hannes@...xchg.org>,
"Huangpeng (Peter)" <peter.huangpeng@...wei.com>
Subject: [PATCH 18/23] userfaultfd: buildsystem activation
This allows to select the userfaultfd during configuration to build it.
Signed-off-by: Andrea Arcangeli <aarcange@...hat.com>
---
fs/Makefile | 1 +
init/Kconfig | 11 +++++++++++
2 files changed, 12 insertions(+)
diff --git a/fs/Makefile b/fs/Makefile
index cb92fd4..53e59b2 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -27,6 +27,7 @@ obj-$(CONFIG_ANON_INODES) += anon_inodes.o
obj-$(CONFIG_SIGNALFD) += signalfd.o
obj-$(CONFIG_TIMERFD) += timerfd.o
obj-$(CONFIG_EVENTFD) += eventfd.o
+obj-$(CONFIG_USERFAULTFD) += userfaultfd.o
obj-$(CONFIG_AIO) += aio.o
obj-$(CONFIG_FS_DAX) += dax.o
obj-$(CONFIG_FILE_LOCKING) += locks.o
diff --git a/init/Kconfig b/init/Kconfig
index 88ad043..e1c9d9e 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1644,6 +1644,17 @@ config ADVISE_SYSCALLS
applications use these syscalls, you can disable this option to save
space.
+config USERFAULTFD
+ bool "Enable userfaultfd() system call"
+ select ANON_INODES
+ default y
+ depends on MMU
+ help
+ Enable the userfaultfd() system call that allows to intercept and
+ handle page faults in userland.
+
+ If unsure, say Y.
+
config PCI_QUIRKS
default y
bool "Enable PCI quirk workarounds" if EXPERT
--
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