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[PATCH 00/15] vdso: Clean up the vsyscall.h headers

From: Thomas Weißschuh <hidden>
Date: 2026-09-09 08:51:47
Also in: linux-arch, linux-arm-kernel, linux-mips, linux-riscv, linux-s390, lkml, loongarch, sparclinux

The vsyscall.h headers are a mess. Some of that was necessary back when
some architectures where not using the generic vDSO infrastructure.
Now that this is not necessary anymore, the headers can be cleaned up
and many of the can be deleted altogether.

The recipient list is trimmed to only the vDSO maintainers and the
architecture lists.

Signed-off-by: Thomas Weißschuh <redacted>
---
Thomas Weißschuh (15):
      vdso: Move the kernel-side time update helpers to a new header
      vdso/gettimeofday: Define fallback __arch_get_vdso_u_time_data() in gettimeofday.c
      vdso/getrandom: Define fallback __arch_get_vdso_u_rng_data() in getrandom.c
      vdso/vsyscall: Define fallback time synchronization functions in vsyscall.c
      vdso: Delete asm-generic/vdso/vsyscall.h
      x86/vdso: Move vDSO page definitions to asm/vdso.h
      sparc/vdso: Move __VDSO_PAGES to asm/vdso.h
      s390/vdso: Delete asm/vdso/vsyscall.h inclusions
      sparc/vdso: Delete asm/vdso/vsyscall.h inclusion
      x86/vdso: Delete asm/vdso/vsyscall.h inclusions
      arm64/vdso: Delete asm/vdso/vsyscall.h inclusions
      riscv/hwprobe: Include vdso/datapage.h
      vdso: Remove unnecessary vdso/vsyscall.h includes
      vdso: Add asm-generic/vdso/vsyscall.h
      vdso: Remove __ASSEMBLER__ guards from vsyscall.h

 MAINTAINERS                                  |  2 +-
 arch/arm/include/asm/vdso/vsyscall.h         |  7 ------
 arch/arm/kernel/vdso.c                       |  1 -
 arch/arm64/include/asm/vdso/getrandom.h      |  1 -
 arch/arm64/include/asm/vdso/vsyscall.h       |  7 ------
 arch/arm64/kernel/vdso.c                     |  1 -
 arch/arm64/kernel/vdso/vdso.lds.S            |  1 -
 arch/loongarch/include/asm/vdso/vsyscall.h   | 14 -----------
 arch/loongarch/kernel/vdso.c                 |  1 -
 arch/mips/include/asm/vdso/vsyscall.h        | 16 -------------
 arch/mips/kernel/vdso.c                      |  1 -
 arch/powerpc/include/asm/vdso/vsyscall.h     | 14 -----------
 arch/riscv/include/asm/vdso/vsyscall.h       | 14 -----------
 arch/riscv/kernel/sys_hwprobe.c              |  2 +-
 arch/riscv/kernel/vdso.c                     |  1 -
 arch/s390/include/asm/vdso/getrandom.h       |  1 -
 arch/s390/include/asm/vdso/vsyscall.h        | 16 -------------
 arch/s390/kernel/time.c                      |  6 ++---
 arch/s390/kernel/vdso.c                      |  1 -
 arch/s390/kernel/vdso/vdso.lds.S             |  1 -
 arch/sparc/include/asm/vdso.h                |  6 +++++
 arch/sparc/include/asm/vdso/vsyscall.h       | 10 --------
 arch/sparc/vdso/vdso-layout.lds.S            |  2 +-
 arch/sparc/vdso/vma.c                        |  1 -
 arch/x86/entry/vdso/common/vdso-layout.lds.S |  1 -
 arch/x86/entry/vdso/vma.c                    |  1 -
 arch/x86/include/asm/vdso.h                  |  7 ++++++
 arch/x86/include/asm/vdso/vsyscall.h         | 22 -----------------
 include/asm-generic/Kbuild                   |  1 +
 include/asm-generic/vdso/vsyscall.h          | 35 ----------------------------
 include/linux/vdso_time.h                    |  8 +++++++
 include/vdso/vsyscall.h                      |  7 ------
 kernel/time/vsyscall.c                       | 25 +++++++++++++++-----
 lib/vdso/getrandom.c                         |  8 +++++--
 lib/vdso/gettimeofday.c                      | 10 +++++---
 35 files changed, 60 insertions(+), 192 deletions(-)
---
base-commit: 1c2a9f9d89050cd9f2b2280060a9442338a1e6fe
change-id: 20260812-vdso-asm-generic-vsyscall-h-0f66fe59ad5c

Best regards,
--  
Thomas Weißschuh [off-list ref]

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