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userfaultfd: buildsystem activation

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This allows to select the userfaultfd during configuration to build it.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Cc: Sanidhya Kashyap <sanidhya.gatech@gmail.com>
Cc: zhang.zhanghailiang@huawei.com
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Andres Lagar-Cavilla <andreslc@google.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Hugh Dickins <hughd@google.com>
Cc: Peter Feiner <pfeiner@google.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "Huangpeng (Peter)" <peter.huangpeng@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrea Arcangeli 2015-09-04 15:46:54 -07:00 committed by Linus Torvalds
parent 8d2afd96c2
commit a14c151e56
2 changed files with 12 additions and 0 deletions
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1
fs/Makefile
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@ -27,6 +27,7 @@ obj-$(CONFIG_ANON_INODES) += anon_inodes.o
obj-$(CONFIG_SIGNALFD) += signalfd.o obj-$(CONFIG_SIGNALFD) += signalfd.o
obj-$(CONFIG_TIMERFD) += timerfd.o obj-$(CONFIG_TIMERFD) += timerfd.o
obj-$(CONFIG_EVENTFD) += eventfd.o obj-$(CONFIG_EVENTFD) += eventfd.o
obj-$(CONFIG_USERFAULTFD) += userfaultfd.o
obj-$(CONFIG_AIO) += aio.o obj-$(CONFIG_AIO) += aio.o
obj-$(CONFIG_FS_DAX) += dax.o obj-$(CONFIG_FS_DAX) += dax.o
obj-$(CONFIG_FILE_LOCKING) += locks.o obj-$(CONFIG_FILE_LOCKING) += locks.o

11
init/Kconfig
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@ -1576,6 +1576,17 @@ config ADVISE_SYSCALLS
applications use these syscalls, you can disable this option to save applications use these syscalls, you can disable this option to save
space. 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 config PCI_QUIRKS
default y default y
bool "Enable PCI quirk workarounds" if EXPERT bool "Enable PCI quirk workarounds" if EXPERT