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authorPeter Xu <peterx@redhat.com>2022-05-12 20:22:56 -0700
committerAndrew Morton <akpm@linux-foundation.org>2022-05-13 07:20:12 -0700
commit430529b5c631749329c61113703c7a9b6cf72973 (patch)
treeb9eb60a6b7df54e1b86993664779bb5711faf45f /init
parent1bf0831383c6b372ff870d061ee62156635035c2 (diff)
downloadlwn-430529b5c631749329c61113703c7a9b6cf72973.tar.gz
lwn-430529b5c631749329c61113703c7a9b6cf72973.zip
mm/uffd: move USERFAULTFD configs into mm/
We used to have USERFAULTFD configs stored in init/. It makes sense as a start because that's the default place for storing syscall related configs. However userfaultfd evolved a bit in the past few years and some more config options were added. They're no longer related to syscalls and start to be not suitable to be kept in the init/ directory anymore, because they're pure mm concepts. But it's not ideal either to keep the userfaultfd configs separate from each other. Hence this patch moves the userfaultfd configs under init/ to be under mm/ so that we'll start to group all userfaultfd configs together. We do have quite a few examples of syscall related configs that are not put under init/Kconfig: FTRACE_SYSCALLS, SWAP, FILE_LOCKING, MEMFD_CREATE.. They all reside in the dir where they're more suitable for the concept. So it seems there's no restriction to keep the role of having syscall related CONFIG_* under init/ only. Link: https://lkml.kernel.org/r/20220420144823.35277-1-peterx@redhat.com Signed-off-by: Peter Xu <peterx@redhat.com> Suggested-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Axel Rasmussen <axelrasmussen@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig17
1 files changed, 0 insertions, 17 deletions
diff --git a/init/Kconfig b/init/Kconfig
index ddcbefe535e9..b062cd745de6 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1667,16 +1667,6 @@ config ADVISE_SYSCALLS
applications use these syscalls, you can disable this option to save
space.
-config HAVE_ARCH_USERFAULTFD_WP
- bool
- help
- Arch has userfaultfd write protection support
-
-config HAVE_ARCH_USERFAULTFD_MINOR
- bool
- help
- Arch has userfaultfd minor fault support
-
config MEMBARRIER
bool "Enable membarrier() system call" if EXPERT
default y
@@ -1741,13 +1731,6 @@ config KALLSYMS_BASE_RELATIVE
# syscall, maps, verifier
-config USERFAULTFD
- bool "Enable userfaultfd() system call"
- depends on MMU
- help
- Enable the userfaultfd() system call that allows to intercept and
- handle page faults in userland.
-
config ARCH_HAS_MEMBARRIER_CALLBACKS
bool