Make anon_inodes unconditional

Make the anon_inodes facility unconditional so that it can be used by core
VFS code and pidfd code.

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 pidfds]
Signed-off-by: Christian Brauner <christian@brauner.io>

18 files changed, 1 insertions, 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 5ad92419be19..7a70fb58b2d0 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