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y2038: add 64-bit time_t syscalls to all 32-bit architectures

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This adds 21 new system calls on each ABI that has 32-bit time_t
today. All of these have the exact same semantics as their existing
counterparts, and the new ones all have macro names that end in 'time64'
for clarification.

This gets us to the point of being able to safely use a C library
that has 64-bit time_t in user space. There are still a couple of
loose ends to tie up in various areas of the code, but this is the
big one, and should be entirely uncontroversial at this point.

In particular, there are four system calls (getitimer, setitimer,
waitid, and getrusage) that don't have a 64-bit counterpart yet,
but these can all be safely implemented in the C library by wrapping
around the existing system calls because the 32-bit time_t they
pass only counts elapsed time, not time since the epoch. They
will be dealt with later.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Arnd Bergmann
2019-01-10 12:45:11 +01:00
parent d33c577ccc
commit 48166e6ea4
19 changed files with 374 additions and 2 deletions
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20
arch/s390/kernel/syscalls/syscall.tbl
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@@ -406,3 +406,23 @@
400 common msgsnd sys_msgsnd compat_sys_msgsnd
401 common msgrcv sys_msgrcv compat_sys_msgrcv
402 common msgctl sys_msgctl compat_sys_msgctl
403 32 clock_gettime64 - sys_clock_gettime
404 32 clock_settime64 - sys_clock_settime
405 32 clock_adjtime64 - sys_clock_adjtime
406 32 clock_getres_time64 - sys_clock_getres
407 32 clock_nanosleep_time64 - sys_clock_nanosleep
408 32 timer_gettime64 - sys_timer_gettime
409 32 timer_settime64 - sys_timer_settime
410 32 timerfd_gettime64 - sys_timerfd_gettime
411 32 timerfd_settime64 - sys_timerfd_settime
412 32 utimensat_time64 - sys_utimensat
413 32 pselect6_time64 - compat_sys_pselect6_time64
414 32 ppoll_time64 - compat_sys_ppoll_time64
416 32 io_pgetevents_time64 - sys_io_pgetevents
417 32 recvmmsg_time64 - compat_sys_recvmmsg_time64
418 32 mq_timedsend_time64 - sys_mq_timedsend
419 32 mq_timedreceive_time64 - sys_mq_timedreceive
420 32 semtimedop_time64 - sys_semtimedop
421 32 rt_sigtimedwait_time64 - compat_sys_rt_sigtimedwait_time64
422 32 futex_time64 - sys_futex
423 32 sched_rr_get_interval_time64 - sys_sched_rr_get_interval