The generic vDSO provides a lot common functionality shared between
different architectures. SPARC is the last architecture not using it,
preventing some necessary code cleanup.
Make use of the generic infrastructure.
Follow-up to and replacement for Arnd's SPARC vDSO removal patches:
https://lore.kernel.org/lkml/20250707144726.4008707-1-arnd@kernel.org/
Only tested on QEMU.
Based von v6.16-rc1.
Marked as RFC for testing and review only.
Will be properly resubmitted after v6.17-rc1.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
Arnd Bergmann (1):
clocksource: remove ARCH_CLOCKSOURCE_DATA
Thomas Weißschuh (13):
vdso: add struct __kernel_old_timeval forward declaration to gettime.h
sparc64: time: Remove architecture-specific clocksource data
sparc64: vdso: Link with -z noexecstack
sparc64: vdso: Remove obsolete "fake section table" reservation
sparc64: vdso: Replace code patching with runtime conditional
sparc64: vdso: Move hardware counter read into header
sparc64: vdso: Move syscall fallbacks into header
sparc64: vdso: Introduce vdso/processor.h
sparc64: vdso: Switch to the generic vDSO library
sparc64: vdso2c: Drop sym_vvar_start handling
sparc64: vdso2c: Remove symbol handling
sparc64: vdso: Implement clock_gettime64()
sparc64: vdso: Implement clock_getres()
arch/sparc/Kconfig | 5 +-
arch/sparc/include/asm/clocksource.h | 9 -
arch/sparc/include/asm/processor.h | 3 +
arch/sparc/include/asm/processor_32.h | 2 -
arch/sparc/include/asm/processor_64.h | 25 --
arch/sparc/include/asm/vdso.h | 2 -
arch/sparc/include/asm/vdso/clocksource.h | 10 +
arch/sparc/include/asm/vdso/gettimeofday.h | 208 ++++++++++++++++
arch/sparc/include/asm/vdso/processor.h | 41 ++++
arch/sparc/include/asm/vdso/vsyscall.h | 10 +
arch/sparc/include/asm/vvar.h | 75 ------
arch/sparc/kernel/Makefile | 1 -
arch/sparc/kernel/time_64.c | 6 +-
arch/sparc/kernel/vdso.c | 69 ------
arch/sparc/vdso/Makefile | 8 +-
arch/sparc/vdso/vclock_gettime.c | 382 +++--------------------------
arch/sparc/vdso/vdso-layout.lds.S | 26 +-
arch/sparc/vdso/vdso.lds.S | 4 +-
arch/sparc/vdso/vdso2c.c | 24 --
arch/sparc/vdso/vdso2c.h | 45 +---
arch/sparc/vdso/vdso32/vdso32.lds.S | 6 +-
arch/sparc/vdso/vma.c | 274 ++-------------------
include/linux/clocksource.h | 6 +-
include/vdso/gettime.h | 1 +
kernel/time/Kconfig | 4 -
25 files changed, 344 insertions(+), 902 deletions(-)
---
base-commit: eaa6313d2ceb2a3f1c870866621058ad6081f028
change-id: 20250722-vdso-sparc64-generic-2-25f2e058e92c
Best regards,
--
Thomas Weißschuh <thomas.weissschuh@linutronix.de>