kernel/git/stable/linux.git/include/vdso/datapage.h, branch masterLinux kernel stable treehttps://git.landau.one/pub/scm/linux/kernel/git/stable/linux.git/atom?h=master2026-06-29T13:44:08+00:00vdso: Replace __ASSEMBLY__ with __ASSEMBLER__ in header files2026-06-29T13:44:08+00:00Thomas Huththuth@redhat.com2026-06-19T10:06:00+00:00urn:sha1:02475538bec2c47d1cce1211823c0453175af6a9
While the GCC and Clang compilers already define __ASSEMBLER__
automatically when compiling assembly code, __ASSEMBLY__ is a macro that
only gets defined by the Makefiles in the kernel.
This can be very confusing when switching between userspace and kernelspace
coding, or when dealing with uapi headers that rather should use
__ASSEMBLER__ instead.
So standardize now on the __ASSEMBLER__ macro that is provided by the
compilers.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://patch.msgid.link/20260619100600.121042-1-thuth@redhat.com
vdso/datapage: Trim down unnecessary includes2026-03-11T14:22:39+00:00Thomas Weißschuhthomas.weissschuh@linutronix.de2026-02-27T06:44:39+00:00urn:sha1:f5e386fe5f1c26b24fb9ffc616f8e857f43cf88d
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 <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260227-vdso-header-cleanups-v2-13-35d60acf7410@linutronix.de
vdso/datapage: Remove inclusion of gettimeofday.h2026-03-11T14:22:32+00:00Thomas Weißschuhthomas.weissschuh@linutronix.de2026-02-27T06:44:38+00:00urn:sha1:750d8cc84901757d9e5fe96207f5aa6b3e2acf92
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 <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260227-vdso-header-cleanups-v2-12-35d60acf7410@linutronix.de
vdso/datapage: Correct struct member kernel-doc2026-03-11T09:14:04+00:00Randy Dunlaprdunlap@infradead.org2026-02-28T07:17:11+00:00urn:sha1:a5ccec8fd10efa50a3fd4444915a2abff31f2535
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 <rdunlap@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260228071711.2663851-1-rdunlap@infradead.org
vdso: Drop Kconfig GENERIC_VDSO_DATA_STORE2025-09-04T09:23:50+00:00Thomas Weißschuhthomas.weissschuh@linutronix.de2025-08-26T06:17:12+00:00urn:sha1:7b338f6d4e3d6baa057e3505592a86f6410d68ed
All users of the generic vDSO library also use the generic vDSO datastore.
Remove the now unnecessary Kconfig symbol.
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-v1-9-d9b65750e49f@linutronix.de
vdso: Move ENABLE_COMPAT_VDSO from core to arm642025-09-04T09:23:49+00:00Thomas Weißschuhthomas.weissschuh@linutronix.de2025-08-26T06:17:06+00:00urn:sha1:7d298d25ce81251068bb4ea1d92813ec764a9fec
The ENABLE_COMAPT_VDSO symbol is only used by arm64 and only for the
time-related functionality. There should be no new users, so it doesn't
need to be in the generic vDSO code.
Move the logic into arm64 architecture-specific code and replace the
explicit define by the standard '#ifdef __aarch64__'.
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-v1-3-d9b65750e49f@linutronix.de
vdso/gettimeofday: Add support for auxiliary clocks2025-07-18T12:09:39+00:00Thomas Weißschuhthomas.weissschuh@linutronix.de2025-07-01T08:58:06+00:00urn:sha1:cd3557a7618bf5c1935e9f66b58a329f1f1f4b27
Expose the auxiliary clocks through the vDSO.
Architectures not using the generic vDSO time framework,
namely SPARC64, are not supported.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250701-vdso-auxclock-v1-12-df7d9f87b9b8@linutronix.de
vdso/vsyscall: Update auxiliary clock data in the datapage2025-07-18T11:45:33+00:00Thomas Weißschuhthomas.weissschuh@linutronix.de2025-07-01T08:58:05+00:00urn:sha1:380b84e168e57c54d0a9e053a5558fddc43f0c1a
Expose the auxiliary clock data so it can be read from the vDSO.
Architectures not using the generic vDSO time framework,
namely SPARC64, are not supported.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250701-vdso-auxclock-v1-11-df7d9f87b9b8@linutronix.de
vdso: Rework struct vdso_time_data and introduce struct vdso_clock2025-03-08T13:37:41+00:00Anna-Maria Behnsenanna-maria@linutronix.de2025-03-03T11:11:21+00:00urn:sha1:886653e36639177dd3ec2e7a4f0dc843d7def3f4
To support multiple PTP clocks, the VDSO data structure needs to be
reworked. All clock specific data will end up in struct vdso_clock and in
struct vdso_time_data there will be an array of VDSO clocks.
Now that all preparatory changes are in place:
Split the clock related struct members into a separate struct
vdso_clock. Make sure all users are aware, that vdso_time_data is no longer
initialized as an array and vdso_clock is now the array inside
vdso_data. Remove the vdso_clock define, which mapped it to vdso_time_data
for the transition.
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250303-vdso-clock-v1-19-c1b5c69a166f@linutronix.de
vdso: Move architecture related data before basetime data2025-03-08T13:37:41+00:00Anna-Maria Behnsenanna-maria@linutronix.de2025-03-03T11:11:20+00:00urn:sha1:97a5a90ca234eaa3de8a6aa44d43de2827393019
Architecture related vdso data is required in the fast path when reading
CLOCK_MONOTONIC or CLOCK_REALTIME. At the moment, this information is
located at the end of the vdso_time_data structure, which is a suboptimal
cache layout.
Move the architecture specific VDSO data right before the basetime
information, which is always required. This change does not have an impact
on architectures with CONFIG_ARCH_HAS_VDSO_DATA=n. Architectures, which
have it enabled, gain a better cache layout.
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250303-vdso-clock-v1-18-c1b5c69a166f@linutronix.de