Hi Christoph, Russell, This is the updated version of my ARM set_fs patches, hopefully I managed to address your previous concerns. I have tested the oabi-compat changes using the LTP tests for the three modified syscalls using an Armv7 kernel and a Debian 5 OABI user space. I also tested the syscall_get_nr() in all combinations of OABI/EABI kernel user space and fixed the bugs I found after Russell pointed out one of those issues. The series is now based on https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git/log/?h=base.set_fs with no extra patches, after I included a patch to define a private TASK_SIZE_MAX. Russell, if you would still consider this seris for the next merge window and there are no further review comments, you can pull it from https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git \ arm-kill-set_fs-7 At this point I'd probably just defer it another release and rebase once -rc1 is out, dropping the TASK_SIZE_MAX patch. Arnd Arnd Bergmann (10): mm/maccess: fix unaligned copy_{from,to}_kernel_nofault ARM: traps: use get_kernel_nofault instead of set_fs() ARM: oabi-compat: add epoll_pwait handler ARM: syscall: always store thread_info->syscall ARM: oabi-compat: rework epoll_wait/epoll_pwait emulation ARM: oabi-compat: rework sys_semtimedop emulation ARM: oabi-compat: rework fcntl64() emulation ARM: uaccess: add __{get,put}_kernel_nofault ARM: provide a TASK_SIZE_MAX definition ARM: uaccess: remove set_fs() implementation arch/arm/Kconfig | 1 - arch/arm/include/asm/memory.h | 2 + arch/arm/include/asm/ptrace.h | 1 - arch/arm/include/asm/syscall.h | 16 ++- arch/arm/include/asm/thread_info.h | 4 - arch/arm/include/asm/uaccess-asm.h | 6 - arch/arm/include/asm/uaccess.h | 169 ++++++++++++++------------- arch/arm/kernel/asm-offsets.c | 3 +- arch/arm/kernel/entry-common.S | 17 +-- arch/arm/kernel/process.c | 7 +- arch/arm/kernel/ptrace.c | 9 +- arch/arm/kernel/signal.c | 8 -- arch/arm/kernel/sys_oabi-compat.c | 181 ++++++++++++++++------------- arch/arm/kernel/traps.c | 47 +++----- arch/arm/lib/copy_from_user.S | 3 +- arch/arm/lib/copy_to_user.S | 3 +- arch/arm/tools/syscall.tbl | 2 +- fs/eventpoll.c | 5 +- include/linux/eventpoll.h | 18 +++ include/linux/syscalls.h | 3 + ipc/sem.c | 84 ++++++++----- mm/maccess.c | 28 ++++- 22 files changed, 334 insertions(+), 283 deletions(-) -- 2.27.0
