Merge tag 'timers-vdso-2026-10-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipHEADmaster

Pull VDSO updates from Thomas Gleixner:
 "Updates for the VDSO subsystem:

   - Ensure that the CLOCK_AUX base calculations are properly scaled
     against the base timekeeper. The update function failed to take the
     fractional nanosecond part into account, which results in a
     rounding error.

   - Cleanup and consolidate the vsyscall headers to get rid of
     pointless copies all over the architectures.

   - Replace a runtime conditional in the time getter function for
     namespaced clocks by simple pointer arithmetic which speeds up the
     read function"

* tag 'timers-vdso-2026-10-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  vdso/vsyscall: Keep the CLOCK_AUX base scaled
  vdso/math64: Add and use __iter_div64_u64_rem()
  vdso/math64: Use OPTIMIZER_HIDE_VAR() in __iter_div_u64_rem()
  vdso/gettimeofday: Avoid runtime conditional in do_hres_timens()
  vdso: Remove __ASSEMBLER__ guards from vsyscall.h
  vdso: Add asm-generic/vdso/vsyscall.h
  vdso: Remove unnecessary vdso/vsyscall.h includes
  riscv/hwprobe: Include vdso/datapage.h
  arm64/vdso: Delete asm/vdso/vsyscall.h inclusions
  x86/vdso: Delete asm/vdso/vsyscall.h inclusions
  sparc/vdso: Delete asm/vdso/vsyscall.h inclusion
  s390/vdso: Delete asm/vdso/vsyscall.h inclusions
  sparc/vdso: Move __VDSO_PAGES to asm/vdso.h
  x86/vdso: Move vDSO page definitions to asm/vdso.h
  vdso: Delete asm-generic/vdso/vsyscall.h
  vdso/vsyscall: Define fallback time synchronization functions in vsyscall.c
  vdso/getrandom: Define fallback __arch_get_vdso_u_rng_data() in getrandom.c
  vdso/gettimeofday: Define fallback __arch_get_vdso_u_time_data() in gettimeofday.c
  vdso: Move the kernel-side time update helpers to a new header

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