This is another set of system call changes that were intended to get
merged much earlier. I've rebased the patches on top of the latest kernel
and Deepa's poll/select/io_pgetevents series now, and applied it to the
same y2038 branch for inclusion in 4.21.
This is just a continuation of the earlier system call changes, so I
expect no surprises here, unless I made a mistake in the rebase.
After this series, the only remaining system calls that need to be
modified are:
- setsockopt/getsockopt, they do not need a new entry in the system
call table, only new numbers assigned for their socket options.
Deepa is finalizing her series to passing 64-bit timestamps in cmsg
correctly for SO_TIMESTAMP{,NS,ING}.
Further, we need a new SO_RCVTIMEO/SO_SNDTIMEO implementation
here, which has not been implemented yet.
- waitid/getrusage, this needs a rewrite now from earlier versions
based on recent feedback. The plan now is to incorporate nanosecond
timestamps in a new revision of the 'rusage' structure. Possibly also
include BSD wait6() semantics of passing back the child resource
usage in waitid(), and/or a method to pass a signal mask as in
io_pgetevents(). waitid/getrusage() are not required for correct
behavior with 64-bit time_t and can be safely emulated on top of
the existing syscalls by the C library beyond 2038. This needs more
discussion.
- clock_adjtime, this is also optional and can be implemented
by the C library if necessary. The plan is to do the same as x32
and use the 64-bit structure natively on both 32-bit and 64-bit
architectures. The timex structure contains a 'timeval' at the
moment, but also supports nanoseconds passed in it.
- getitimer/setitimer, these again can be trivially emulated
by the C library.
Arnd
Arnd Bergmann (5):
y2038: futex: Move compat implementation into futex.c
y2038: futex: Add support for __kernel_timespec
y2038: socket: Add compat_sys_recvmmsg_time64
y2038: signal: Add sys_rt_sigtimedwait_time32
y2038: signal: Add compat_sys_rt_sigtimedwait_time64
include/linux/compat.h | 8 +-
include/linux/futex.h | 8 --
include/linux/socket.h | 9 +-
include/linux/syscalls.h | 9 +-
kernel/Makefile | 3 -
kernel/futex.c | 207 +++++++++++++++++++++++++++++++++++++--
kernel/futex_compat.c | 202 --------------------------------------
kernel/signal.c | 65 ++++++++++++
kernel/sys_ni.c | 2 +
net/compat.c | 34 +++----
net/socket.c | 62 +++++++++---
11 files changed, 345 insertions(+), 264 deletions(-)
delete mode 100644 kernel/futex_compat.c
--
2.18.0
