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Message-ID: <20251110185440.2667511-1-hca@linux.ibm.com>
Date: Mon, 10 Nov 2025 19:54:32 +0100
From: Heiko Carstens <hca@...ux.ibm.com>
To: Alexander Gordeev <agordeev@...ux.ibm.com>,
Vasily Gorbik <gor@...ux.ibm.com>,
Christian Borntraeger <borntraeger@...ux.ibm.com>,
Sven Schnelle <svens@...ux.ibm.com>,
Andreas Krebbel <krebbel@...ux.ibm.com>, Arnd Bergmann <arnd@...db.de>,
Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org
Subject: [RFC PATCH 0/8] s390: Remove compat support
Remove s390 compat support to allow for code simplification and especially
reduced test effort. To the best of our knowledge there aren't any 31 bit
binaries out in the world anymore that would matter for newer kernels or
newer distributions.
Distributions do not provide compat packages since quite some time or even
have CONFIG_COMPAT disabled.
Instead of adding deprecation warnings to config option, or adding kernel
messages, just remove the code. Deprecation warnings haven't proven to be
useful. If it turns out there is still a reason to keep the compat support
this series can be reverted at any time in the future.
Arnd, we talked about this two weeks ago. I would appreciate if you could
have a look at this series, especially the last patch of this series.
Patches 1-3 are just some random cleanups / preparations.
Patches 4-6 remove compat support.
Patches 7-8 switch s390 to generic system call table generation
Thanks,
Heiko
Heiko Carstens (8):
s390/ptrace: Rename psw_t32 to psw32_t
s390/kvm: Use psw32_t instead of psw_compat_t
s390/syscalls: Add pt_regs parameter to SYSCALL_DEFINE0() syscall wrapper
tools: Remove s390 compat support
s390: Remove compat support
s390/uapi: Remove 31 bit support from uapi header files
s390/syscalls: Remove system call table pointer from thread_struct
s390/syscalls: Switch to generic system call table generation
arch/s390/Kconfig | 16 -
arch/s390/Makefile | 6 +-
arch/s390/boot/ipl_data.c | 3 +-
arch/s390/configs/compat.config | 3 -
arch/s390/hypfs/hypfs_sprp.c | 6 +-
arch/s390/include/asm/compat.h | 140 ---
arch/s390/include/asm/elf.h | 47 +-
arch/s390/include/asm/ftrace.h | 19 +-
arch/s390/include/asm/processor.h | 13 +-
arch/s390/include/asm/ptrace.h | 2 +-
arch/s390/include/asm/seccomp.h | 5 -
arch/s390/include/asm/syscall.h | 19 +-
arch/s390/include/asm/syscall_wrapper.h | 95 +-
arch/s390/include/asm/thread_info.h | 2 -
arch/s390/include/asm/unistd.h | 8 +-
arch/s390/include/asm/vdso-symbols.h | 8 -
arch/s390/include/uapi/asm/bitsperlong.h | 4 -
arch/s390/include/uapi/asm/ipcbuf.h | 3 -
arch/s390/include/uapi/asm/posix_types.h | 13 -
arch/s390/include/uapi/asm/ptrace.h | 124 ---
arch/s390/include/uapi/asm/sigcontext.h | 15 -
arch/s390/include/uapi/asm/stat.h | 70 --
arch/s390/include/uapi/asm/unistd.h | 4 -
arch/s390/kernel/Makefile | 4 -
arch/s390/kernel/audit.c | 16 -
arch/s390/kernel/audit.h | 16 -
arch/s390/kernel/compat_audit.c | 48 -
arch/s390/kernel/compat_linux.c | 289 ------
arch/s390/kernel/compat_linux.h | 101 ---
arch/s390/kernel/compat_ptrace.h | 64 --
arch/s390/kernel/compat_signal.c | 420 ---------
arch/s390/kernel/entry.S | 17 -
arch/s390/kernel/perf_cpum_cf.c | 1 -
arch/s390/kernel/perf_event.c | 1 -
arch/s390/kernel/perf_regs.c | 3 -
arch/s390/kernel/process.c | 9 +-
arch/s390/kernel/ptrace.c | 524 -----------
arch/s390/kernel/setup.c | 1 -
arch/s390/kernel/signal.c | 23 +-
arch/s390/kernel/stacktrace.c | 3 -
arch/s390/kernel/syscall.c | 12 +-
arch/s390/kernel/syscalls/Makefile | 58 +-
arch/s390/kernel/syscalls/syscall.tbl | 856 ++++++++----------
arch/s390/kernel/syscalls/syscalltbl | 232 -----
arch/s390/kernel/uprobes.c | 6 +-
arch/s390/kernel/vdso.c | 26 +-
arch/s390/kernel/vdso32/.gitignore | 2 -
arch/s390/kernel/vdso32/Makefile | 64 --
arch/s390/kernel/vdso32/gen_vdso_offsets.sh | 15 -
arch/s390/kernel/vdso32/note.S | 13 -
arch/s390/kernel/vdso32/vdso32.lds.S | 140 ---
arch/s390/kernel/vdso32/vdso32_wrapper.S | 15 -
arch/s390/kernel/vdso32/vdso_user_wrapper.S | 22 -
arch/s390/kvm/priv.c | 2 +-
arch/s390/mm/fault.c | 1 -
arch/s390/mm/mmap.c | 1 -
arch/s390/pci/pci_clp.c | 4 +-
drivers/s390/block/dasd.c | 1 -
drivers/s390/block/dasd_eckd.c | 11 -
drivers/s390/block/dasd_ioctl.c | 6 +-
drivers/s390/char/con3270.c | 19 -
drivers/s390/char/fs3270.c | 7 +-
drivers/s390/char/sclp_ctl.c | 12 +-
drivers/s390/char/tape_char.c | 26 -
drivers/s390/char/vmcp.c | 7 +-
drivers/s390/cio/chsc_sch.c | 7 +-
drivers/s390/crypto/zcrypt_api.c | 195 ----
drivers/s390/crypto/zcrypt_card.c | 1 -
drivers/s390/crypto/zcrypt_queue.c | 1 -
drivers/s390/net/qeth_core_main.c | 4 +-
.../arch/s390/include/uapi/asm/bitsperlong.h | 4 -
tools/build/feature/test-bpf.c | 2 +-
tools/include/asm/barrier.h | 2 +-
tools/include/nolibc/arch-s390.h | 5 -
tools/include/nolibc/arch.h | 2 +-
tools/include/uapi/asm/bitsperlong.h | 2 +-
tools/include/uapi/asm/bpf_perf_event.h | 2 +-
tools/lib/bpf/bpf.c | 2 +-
tools/lib/bpf/bpf_tracing.h | 2 +-
tools/lib/bpf/libbpf.c | 4 -
tools/lib/bpf/usdt.c | 2 -
tools/perf/util/header.c | 2 +-
tools/testing/selftests/bpf/sdt.h | 2 +-
tools/testing/selftests/bpf/usdt.h | 2 +-
.../selftests/ptrace/set_syscall_info.c | 2 +-
tools/testing/selftests/rseq/param_test.c | 2 +-
tools/testing/selftests/rseq/rseq-s390.h | 39 -
tools/testing/selftests/rseq/rseq.h | 2 +-
.../selftests/rseq/syscall_errors_test.c | 2 +-
tools/testing/selftests/seccomp/seccomp_bpf.c | 4 +-
tools/testing/selftests/vDSO/vdso_config.h | 4 -
91 files changed, 476 insertions(+), 3545 deletions(-)
delete mode 100644 arch/s390/configs/compat.config
delete mode 100644 arch/s390/include/asm/compat.h
delete mode 100644 arch/s390/kernel/audit.h
delete mode 100644 arch/s390/kernel/compat_audit.c
delete mode 100644 arch/s390/kernel/compat_linux.c
delete mode 100644 arch/s390/kernel/compat_linux.h
delete mode 100644 arch/s390/kernel/compat_ptrace.h
delete mode 100644 arch/s390/kernel/compat_signal.c
delete mode 100755 arch/s390/kernel/syscalls/syscalltbl
delete mode 100644 arch/s390/kernel/vdso32/.gitignore
delete mode 100644 arch/s390/kernel/vdso32/Makefile
delete mode 100755 arch/s390/kernel/vdso32/gen_vdso_offsets.sh
delete mode 100644 arch/s390/kernel/vdso32/note.S
delete mode 100644 arch/s390/kernel/vdso32/vdso32.lds.S
delete mode 100644 arch/s390/kernel/vdso32/vdso32_wrapper.S
delete mode 100644 arch/s390/kernel/vdso32/vdso_user_wrapper.S
--
2.48.1
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