vdso: Drop Kconfig GENERIC_VDSO_TIME_NS

All architectures implementing time-related functionality in the vDSO are
using the generic vDSO library which handles time namespaces properly.

Remove the now unnecessary Kconfig symbol.

Enables the use of time namespaces on architectures, which use the
generic vDSO but did not enable GENERIC_VDSO_TIME_NS, namely MIPS and arm.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/all/20250826-vdso-cleanups-v1-10-d9b65750e49f@linutronix.de

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index b0f007b..e19b006 100644 (file)
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -162,7 +162,6 @@ config ARM64
        select GENERIC_SMP_IDLE_THREAD
        select GENERIC_TIME_VSYSCALL
        select GENERIC_GETTIMEOFDAY
-       select GENERIC_VDSO_TIME_NS
        select HARDIRQS_SW_RESEND
        select HAS_IOPORT
        select HAVE_MOVE_PMD

diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index d15b201..754626b 100644 (file)
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -108,7 +108,6 @@ config LOONGARCH
        select GENERIC_SCHED_CLOCK
        select GENERIC_SMP_IDLE_THREAD
        select GENERIC_TIME_VSYSCALL
-       select GENERIC_VDSO_TIME_NS
        select GPIOLIB
        select HAS_IOPORT
        select HAVE_ARCH_AUDITSYSCALL

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 78c82af..d715e3d 100644 (file)
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -207,7 +207,6 @@ config PPC
        select GENERIC_PCI_IOMAP                if PCI
        select GENERIC_SMP_IDLE_THREAD
        select GENERIC_TIME_VSYSCALL
-       select GENERIC_VDSO_TIME_NS
        select HAS_IOPORT                       if PCI
        select HAVE_ARCH_AUDITSYSCALL
        select HAVE_ARCH_HUGE_VMALLOC           if HAVE_ARCH_HUGE_VMAP

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index f6cf918..6e5efbe 100644 (file)
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -121,7 +121,6 @@ config RISCV
        select GENERIC_SCHED_CLOCK
        select GENERIC_SMP_IDLE_THREAD
        select GENERIC_TIME_VSYSCALL if GENERIC_GETTIMEOFDAY
-       select GENERIC_VDSO_TIME_NS if GENERIC_GETTIMEOFDAY
        select HARDIRQS_SW_RESEND
        select HAS_IOPORT if MMU
        select HAVE_ALIGNED_STRUCT_PAGE

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 696d224..e06ebbd 100644 (file)
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -167,7 +167,6 @@ config S390
        select GENERIC_GETTIMEOFDAY
        select GENERIC_SMP_IDLE_THREAD
        select GENERIC_TIME_VSYSCALL
-       select GENERIC_VDSO_TIME_NS
        select GENERIC_IOREMAP if PCI
        select HAVE_ALIGNED_STRUCT_PAGE
        select HAVE_ARCH_AUDITSYSCALL

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 1e74b2a..d196181 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -181,7 +181,6 @@ config X86
        select GENERIC_SMP_IDLE_THREAD
        select GENERIC_TIME_VSYSCALL
        select GENERIC_GETTIMEOFDAY
-       select GENERIC_VDSO_TIME_NS
        select GENERIC_VDSO_OVERFLOW_PROTECT
        select GUP_GET_PXX_LOW_HIGH             if X86_PAE
        select HARDIRQS_SW_RESEND

diff --git a/init/Kconfig b/init/Kconfig
index d811cad..497bd32 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1347,7 +1347,7 @@ config UTS_NS
 
 config TIME_NS
        bool "TIME namespace"
-       depends on GENERIC_VDSO_TIME_NS
+       depends on GENERIC_GETTIMEOFDAY
        default y
        help
          In this namespace boottime and monotonic clocks can be set.

diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
index 48ffb0f..3d2c2b9 100644 (file)
--- a/lib/vdso/Kconfig
+++ b/lib/vdso/Kconfig
@@ -12,12 +12,6 @@ config GENERIC_GETTIMEOFDAY
          Each architecture that enables this feature has to
          provide the fallback implementation.
 
-config GENERIC_VDSO_TIME_NS
-       bool
-       help
-         Selected by architectures which support time namespaces in the
-         VDSO
-
 config GENERIC_VDSO_OVERFLOW_PROTECT
        bool
        help

diff --git a/tools/testing/selftests/pidfd/config b/tools/testing/selftests/pidfd/config
index 6133524..cf7cc0c 100644 (file)
--- a/tools/testing/selftests/pidfd/config
+++ b/tools/testing/selftests/pidfd/config
@@ -4,6 +4,5 @@ CONFIG_USER_NS=y
 CONFIG_PID_NS=y
 CONFIG_NET_NS=y
 CONFIG_TIME_NS=y
-CONFIG_GENERIC_VDSO_TIME_NS=y
 CONFIG_CGROUPS=y
 CONFIG_CHECKPOINT_RESTORE=y