kernel/linux.git/include/vdso, branch master

vdso/datapage: Trim down unnecessary includes

2026-03-11T14:22:39+00:00

vdso/datapage.h includes a lot of headers which are not strictly necessary. Some of those headers include architecture-specific vDSO headers which prevent the usage of vdso/datapage.h in kernel code on architectures without an vDSO. This would be useful however to write generic code using IS_ENABLED(), for example in drivers/char/random.c. Remove the unnecessary includes. Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Signed-off-by: Borislav Petkov (AMD) Link: https://patch.msgid.link/20260227-vdso-header-cleanups-v2-13-35d60acf7410@linutronix.de

vdso/datapage: Remove inclusion of gettimeofday.h

2026-03-11T14:22:32+00:00

vdso/datapage.h is useful without pulling in the architecture-specific gettimeofday() helpers. Move the include to the only users which needs it. Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Signed-off-by: Borislav Petkov (AMD) Link: https://patch.msgid.link/20260227-vdso-header-cleanups-v2-12-35d60acf7410@linutronix.de

vdso/helpers: Explicitly include vdso/processor.h

2026-03-11T14:22:26+00:00

The usage of cpu_relax() requires vdso/processor.h. Currently this header is included transitively, but that transitive inclusion is about to go away. Explicitly include the header. Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Signed-off-by: Borislav Petkov (AMD) Link: https://patch.msgid.link/20260227-vdso-header-cleanups-v2-11-35d60acf7410@linutronix.de

vdso/gettimeofday: Move the unlikely() into vdso_read_retry()

2026-03-11T14:12:05+00:00

All callers of vdso_read_retry() test its return value with unlikely(). Move the unlikely into the helper to make the code easier to read. This is equivalent to the retry function of non-vDSO seqlocks. Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Signed-off-by: Borislav Petkov (AMD) Link: https://patch.msgid.link/20260227-vdso-cleanups-v1-4-c848b4bc4850@linutronix.de

vdso/gettimeofday: Add a helper to test if a clock is namespaced

2026-03-11T14:09:59+00:00

Currently this logic is duplicate multiple times. Add a helper for it to make the code more readable. [ bp: Add a missing clocksource.h include, see https://lore.kernel.org/r/20260311113435-f72f81d8-33a6-4a0f-bd80-4997aad068cc@linutronix.de ] Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Signed-off-by: Borislav Petkov (AMD) Link: https://patch.msgid.link/20260227-vdso-cleanups-v1-3-c848b4bc4850@linutronix.de

vdso/gettimeofday: Add a helper to read the sequence lock of a time namespace aware clock

2026-03-11T09:27:35+00:00

Currently there are three different open-coded variants of a time namespace aware variant of vdso_read_begin(). They make the code hard to read and introduce an inconsistency, as only the first copy uses unlikely(). Split the code into a shared helper function. Move that next to the definition of the regular vdso_read_begin(), so that any future changes can be kept in sync easily. Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://patch.msgid.link/20260227-vdso-cleanups-v1-2-c848b4bc4850@linutronix.de

vdso/datapage: Correct struct member kernel-doc

2026-03-11T09:14:04+00:00

Remove the "[]" array indicators from the struct member descriptions to avoid kernel-doc warnings. Warning: include/vdso/datapage.h:107 struct member 'basetime' not described in 'vdso_clock' Warning: include/vdso/datapage.h:107 struct member 'offset' not described in 'vdso_clock' Signed-off-by: Randy Dunlap Signed-off-by: Thomas Gleixner Link: https://patch.msgid.link/20260228071711.2663851-1-rdunlap@infradead.org

vdso: Switch get/put_unaligned() from packed struct to memcpy()

2026-01-14T07:56:41+00:00

Type punning is necessary for get/put_unaligned() but the use of a packed struct violates strict aliasing rules, requiring -fno-strict-aliasing to be passed to the C compiler. Switch to using memcpy() so that -fno-strict-aliasing isn't necessary. Signed-off-by: Ian Rogers Signed-off-by: Thomas Gleixner Link: https://patch.msgid.link/20251016205126.2882625-3-irogers@google.com

vdso: Add prototype for __vdso_clock_getres_time64()

2026-01-13T13:42:23+00:00

For consistency with __vdso_clock_gettime64() there should also be a 64-bit variant of clock_getres(). This will allow the extension of CONFIG_COMPAT_32BIT_TIME to the vDSO and finally the removal of 32-bit time types from the kernel and UAPI. The generic vDSO library already provides nearly all necessary building blocks for architectures to provide this function. Only a prototype is missing. Add the prototype to the generic header so architectures can start providing this function. Suggested-by: Arnd Bergmann Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://patch.msgid.link/20251223-vdso-compat-time32-v1-1-97ea7a06a543@linutronix.de

Merge tag 'timers-vdso-2025-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-09-30T23:58:21+00:00

Pull VDSO updates from Thomas Gleixner: - Further consolidation of the VDSO infrastructure and the common data store - Simplification of the related Kconfig logic - Improve the VDSO selftest suite * tag 'timers-vdso-2025-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: selftests: vDSO: Drop vdso_test_clock_getres selftests: vDSO: vdso_test_abi: Add tests for clock_gettime64() selftests: vDSO: vdso_test_abi: Test CPUTIME clocks selftests: vDSO: vdso_test_abi: Use explicit indices for name array selftests: vDSO: vdso_test_abi: Drop clock availability tests selftests: vDSO: vdso_test_abi: Use ksft_finished() selftests: vDSO: vdso_test_abi: Correctly skip whole test with missing vDSO selftests: vDSO: Fix -Wunitialized in powerpc VDSO_CALL() wrapper vdso: Add struct __kernel_old_timeval forward declaration to gettime.h vdso: Gate VDSO_GETRANDOM behind HAVE_GENERIC_VDSO vdso: Drop Kconfig GENERIC_VDSO_TIME_NS vdso: Drop Kconfig GENERIC_VDSO_DATA_STORE vdso: Drop kconfig GENERIC_COMPAT_VDSO vdso: Drop kconfig GENERIC_VDSO_32 riscv: vdso: Untangle Kconfig logic time: Build generic update_vsyscall() only with generic time vDSO vdso/gettimeofday: Remove !CONFIG_TIME_NS stubs vdso: Move ENABLE_COMPAT_VDSO from core to arm64 ARM: VDSO: Remove cntvct_ok global variable vdso/datastore: Gate time data behind CONFIG_GENERIC_GETTIMEOFDAY