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Subject[PATCH 11/21] userfaultfd: buildsystem activation
Date
This allows to select the userfaultfd during configuration to build it.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
---
fs/Makefile | 1 +
init/Kconfig | 11 +++++++++++
2 files changed, 12 insertions(+)

diff --git a/fs/Makefile b/fs/Makefile
index a88ac48..ba8ab62 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 f5dbc6d..580dae7 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1550,6 +1550,17 @@ 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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