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    Subject[PATCH v1 1/4] Make anon_inodes unconditional
    Date
    From: David Howells <dhowells@redhat.com>

    Make the anon_inodes facility unconditional so that it can be used by core
    VFS code and the pidctl() syscall.

    Signed-off-by: David Howells <dhowells@redhat.com>
    Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
    [christian@brauner.io: adapt commit message to mention pidctl()]
    Signed-off-by: Christian Brauner <christian@brauner.io>
    ---
    arch/arm/kvm/Kconfig | 1 -
    arch/arm64/kvm/Kconfig | 1 -
    arch/mips/kvm/Kconfig | 1 -
    arch/powerpc/kvm/Kconfig | 1 -
    arch/s390/kvm/Kconfig | 1 -
    arch/x86/Kconfig | 1 -
    arch/x86/kvm/Kconfig | 1 -
    drivers/base/Kconfig | 1 -
    drivers/char/tpm/Kconfig | 1 -
    drivers/dma-buf/Kconfig | 1 -
    drivers/gpio/Kconfig | 1 -
    drivers/iio/Kconfig | 1 -
    drivers/infiniband/Kconfig | 1 -
    drivers/vfio/Kconfig | 1 -
    fs/Makefile | 2 +-
    fs/notify/fanotify/Kconfig | 1 -
    fs/notify/inotify/Kconfig | 1 -
    init/Kconfig | 10 ----------
    18 files changed, 1 insertion(+), 27 deletions(-)

    diff --git a/arch/arm/kvm/Kconfig b/arch/arm/kvm/Kconfig
    index 3f5320f46de2..f591026347a5 100644
    --- a/arch/arm/kvm/Kconfig
    +++ b/arch/arm/kvm/Kconfig
    @@ -22,7 +22,6 @@ config KVM
    bool "Kernel-based Virtual Machine (KVM) support"
    depends on MMU && OF
    select PREEMPT_NOTIFIERS
    - select ANON_INODES
    select ARM_GIC
    select ARM_GIC_V3
    select ARM_GIC_V3_ITS
    diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig
    index a3f85624313e..a67121d419a2 100644
    --- a/arch/arm64/kvm/Kconfig
    +++ b/arch/arm64/kvm/Kconfig
    @@ -23,7 +23,6 @@ config KVM
    depends on OF
    select MMU_NOTIFIER
    select PREEMPT_NOTIFIERS
    - select ANON_INODES
    select HAVE_KVM_CPU_RELAX_INTERCEPT
    select HAVE_KVM_ARCH_TLB_FLUSH_ALL
    select KVM_MMIO
    diff --git a/arch/mips/kvm/Kconfig b/arch/mips/kvm/Kconfig
    index 4528bc9c3cb1..eac25aef21e0 100644
    --- a/arch/mips/kvm/Kconfig
    +++ b/arch/mips/kvm/Kconfig
    @@ -21,7 +21,6 @@ config KVM
    depends on MIPS_FP_SUPPORT
    select EXPORT_UASM
    select PREEMPT_NOTIFIERS
    - select ANON_INODES
    select KVM_GENERIC_DIRTYLOG_READ_PROTECT
    select HAVE_KVM_VCPU_ASYNC_IOCTL
    select KVM_MMIO
    diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
    index bfdde04e4905..f53997a8ca62 100644
    --- a/arch/powerpc/kvm/Kconfig
    +++ b/arch/powerpc/kvm/Kconfig
    @@ -20,7 +20,6 @@ if VIRTUALIZATION
    config KVM
    bool
    select PREEMPT_NOTIFIERS
    - select ANON_INODES
    select HAVE_KVM_EVENTFD
    select HAVE_KVM_VCPU_ASYNC_IOCTL
    select SRCU
    diff --git a/arch/s390/kvm/Kconfig b/arch/s390/kvm/Kconfig
    index 767453faacfc..1816ee48eadd 100644
    --- a/arch/s390/kvm/Kconfig
    +++ b/arch/s390/kvm/Kconfig
    @@ -21,7 +21,6 @@ config KVM
    prompt "Kernel-based Virtual Machine (KVM) support"
    depends on HAVE_KVM
    select PREEMPT_NOTIFIERS
    - select ANON_INODES
    select HAVE_KVM_CPU_RELAX_INTERCEPT
    select HAVE_KVM_VCPU_ASYNC_IOCTL
    select HAVE_KVM_EVENTFD
    diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
    index c1f9b3cf437c..18f2c954464e 100644
    --- a/arch/x86/Kconfig
    +++ b/arch/x86/Kconfig
    @@ -44,7 +44,6 @@ config X86
    #
    select ACPI_LEGACY_TABLES_LOOKUP if ACPI
    select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI
    - select ANON_INODES
    select ARCH_32BIT_OFF_T if X86_32
    select ARCH_CLOCKSOURCE_DATA
    select ARCH_CLOCKSOURCE_INIT
    diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
    index 72fa955f4a15..fc042419e670 100644
    --- a/arch/x86/kvm/Kconfig
    +++ b/arch/x86/kvm/Kconfig
    @@ -27,7 +27,6 @@ config KVM
    depends on X86_LOCAL_APIC
    select PREEMPT_NOTIFIERS
    select MMU_NOTIFIER
    - select ANON_INODES
    select HAVE_KVM_IRQCHIP
    select HAVE_KVM_IRQFD
    select IRQ_BYPASS_MANAGER
    diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
    index 059700ea3521..03f067da12ee 100644
    --- a/drivers/base/Kconfig
    +++ b/drivers/base/Kconfig
    @@ -174,7 +174,6 @@ source "drivers/base/regmap/Kconfig"
    config DMA_SHARED_BUFFER
    bool
    default n
    - select ANON_INODES
    select IRQ_WORK
    help
    This option enables the framework for buffer-sharing between
    diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
    index 536e55d3919f..f3e4bc490cf0 100644
    --- a/drivers/char/tpm/Kconfig
    +++ b/drivers/char/tpm/Kconfig
    @@ -157,7 +157,6 @@ config TCG_CRB
    config TCG_VTPM_PROXY
    tristate "VTPM Proxy Interface"
    depends on TCG_TPM
    - select ANON_INODES
    ---help---
    This driver proxies for an emulated TPM (vTPM) running in userspace.
    A device /dev/vtpmx is provided that creates a device pair
    diff --git a/drivers/dma-buf/Kconfig b/drivers/dma-buf/Kconfig
    index 2e5a0faa2cb1..3fc9c2efc583 100644
    --- a/drivers/dma-buf/Kconfig
    +++ b/drivers/dma-buf/Kconfig
    @@ -3,7 +3,6 @@ menu "DMABUF options"
    config SYNC_FILE
    bool "Explicit Synchronization Framework"
    default n
    - select ANON_INODES
    select DMA_SHARED_BUFFER
    ---help---
    The Sync File Framework adds explicit syncronization via
    diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
    index 3f50526a771f..0f91600c27ae 100644
    --- a/drivers/gpio/Kconfig
    +++ b/drivers/gpio/Kconfig
    @@ -12,7 +12,6 @@ config ARCH_HAVE_CUSTOM_GPIO_H

    menuconfig GPIOLIB
    bool "GPIO Support"
    - select ANON_INODES
    help
    This enables GPIO support through the generic GPIO library.
    You only need to enable this, if you also want to enable
    diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig
    index d08aeb41cd07..1dec0fecb6ef 100644
    --- a/drivers/iio/Kconfig
    +++ b/drivers/iio/Kconfig
    @@ -4,7 +4,6 @@

    menuconfig IIO
    tristate "Industrial I/O support"
    - select ANON_INODES
    help
    The industrial I/O subsystem provides a unified framework for
    drivers for many different types of embedded sensors using a
    diff --git a/drivers/infiniband/Kconfig b/drivers/infiniband/Kconfig
    index a1fb840de45d..d318bab25860 100644
    --- a/drivers/infiniband/Kconfig
    +++ b/drivers/infiniband/Kconfig
    @@ -25,7 +25,6 @@ config INFINIBAND_USER_MAD

    config INFINIBAND_USER_ACCESS
    tristate "InfiniBand userspace access (verbs and CM)"
    - select ANON_INODES
    depends on MMU
    ---help---
    Userspace InfiniBand access support. This enables the
    diff --git a/drivers/vfio/Kconfig b/drivers/vfio/Kconfig
    index 9de5ed38da83..3798d77d131c 100644
    --- a/drivers/vfio/Kconfig
    +++ b/drivers/vfio/Kconfig
    @@ -22,7 +22,6 @@ menuconfig VFIO
    tristate "VFIO Non-Privileged userspace driver framework"
    depends on IOMMU_API
    select VFIO_IOMMU_TYPE1 if (X86 || S390 || ARM || ARM64)
    - select ANON_INODES
    help
    VFIO provides a framework for secure userspace device drivers.
    See Documentation/vfio.txt for more details.
    diff --git a/fs/Makefile b/fs/Makefile
    index 427fec226fae..35945f8139e6 100644
    --- a/fs/Makefile
    +++ b/fs/Makefile
    @@ -25,7 +25,7 @@ obj-$(CONFIG_PROC_FS) += proc_namespace.o

    obj-y += notify/
    obj-$(CONFIG_EPOLL) += eventpoll.o
    -obj-$(CONFIG_ANON_INODES) += anon_inodes.o
    +obj-y += anon_inodes.o
    obj-$(CONFIG_SIGNALFD) += signalfd.o
    obj-$(CONFIG_TIMERFD) += timerfd.o
    obj-$(CONFIG_EVENTFD) += eventfd.o
    diff --git a/fs/notify/fanotify/Kconfig b/fs/notify/fanotify/Kconfig
    index 735bfb2e9190..521dc91d2cb5 100644
    --- a/fs/notify/fanotify/Kconfig
    +++ b/fs/notify/fanotify/Kconfig
    @@ -1,7 +1,6 @@
    config FANOTIFY
    bool "Filesystem wide access notification"
    select FSNOTIFY
    - select ANON_INODES
    select EXPORTFS
    default n
    ---help---
    diff --git a/fs/notify/inotify/Kconfig b/fs/notify/inotify/Kconfig
    index b981fc0c8379..0161c74e76e2 100644
    --- a/fs/notify/inotify/Kconfig
    +++ b/fs/notify/inotify/Kconfig
    @@ -1,6 +1,5 @@
    config INOTIFY_USER
    bool "Inotify support for userspace"
    - select ANON_INODES
    select FSNOTIFY
    default y
    ---help---
    diff --git a/init/Kconfig b/init/Kconfig
    index 4592bf7997c0..be8f97e37a76 100644
    --- a/init/Kconfig
    +++ b/init/Kconfig
    @@ -1171,9 +1171,6 @@ config LD_DEAD_CODE_DATA_ELIMINATION
    config SYSCTL
    bool

    -config ANON_INODES
    - bool
    -
    config HAVE_UID16
    bool

    @@ -1378,14 +1375,12 @@ config HAVE_FUTEX_CMPXCHG
    config EPOLL
    bool "Enable eventpoll support" if EXPERT
    default y
    - select ANON_INODES
    help
    Disabling this option will cause the kernel to be built without
    support for epoll family of system calls.

    config SIGNALFD
    bool "Enable signalfd() system call" if EXPERT
    - select ANON_INODES
    default y
    help
    Enable the signalfd() system call that allows to receive signals
    @@ -1395,7 +1390,6 @@ config SIGNALFD

    config TIMERFD
    bool "Enable timerfd() system call" if EXPERT
    - select ANON_INODES
    default y
    help
    Enable the timerfd() system call that allows to receive timer
    @@ -1405,7 +1399,6 @@ config TIMERFD

    config EVENTFD
    bool "Enable eventfd() system call" if EXPERT
    - select ANON_INODES
    default y
    help
    Enable the eventfd() system call that allows to receive both
    @@ -1516,7 +1509,6 @@ config KALLSYMS_BASE_RELATIVE
    # syscall, maps, verifier
    config BPF_SYSCALL
    bool "Enable bpf() system call"
    - select ANON_INODES
    select BPF
    select IRQ_WORK
    default n
    @@ -1533,7 +1525,6 @@ config BPF_JIT_ALWAYS_ON

    config USERFAULTFD
    bool "Enable userfaultfd() system call"
    - select ANON_INODES
    depends on MMU
    help
    Enable the userfaultfd() system call that allows to intercept and
    @@ -1600,7 +1591,6 @@ config PERF_EVENTS
    bool "Kernel performance events and counters"
    default y if PROFILING
    depends on HAVE_PERF_EVENTS
    - select ANON_INODES
    select IRQ_WORK
    select SRCU
    help
    --
    2.21.0
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