Merge tag 'y2038-new-syscalls' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground into timers/2038

Pull y2038 - time64 system calls from Arnd Bergmann:

This series finally gets us to the point of having system calls with 64-bit
time_t on all architectures, after a long time of incremental preparation
patches.

There was actually one conversion that I missed during the summer,
i.e. Deepa's timex series, which I now updated based the 5.0-rc1 changes
and review comments.

The following system calls are now added on all 32-bit architectures using
the same system call numbers:

403 clock_gettime64
404 clock_settime64
405 clock_adjtime64
406 clock_getres_time64
407 clock_nanosleep_time64
408 timer_gettime64
409 timer_settime64
410 timerfd_gettime64
411 timerfd_settime64
412 utimensat_time64
413 pselect6_time64
414 ppoll_time64
416 io_pgetevents_time64
417 recvmmsg_time64
418 mq_timedsend_time64
419 mq_timedreceiv_time64
420 semtimedop_time64
421 rt_sigtimedwait_time64
422 futex_time64
423 sched_rr_get_interval_time64

Each one of these corresponds directly to an existing system call that
includes a 'struct timespec' argument, or a structure containing a timespec
or (in case of clock_adjtime) timeval. Not included here are new versions
of getitimer/setitimer and getrusage/waitid, which are planned for the
future but only needed to make a consistent API rather than for correct
operation beyond y2038. These four system calls are based on 'timeval', and
it has not been finally decided what the replacement kernel interface will
use instead.

So far, I have done a lot of build testing across most architectures, which
has found a number of bugs. Runtime testing so far included testing LTP on
32-bit ARM with the existing system calls, to ensure we do not regress for
existing binaries, and a test with a 32-bit x86 build of LTP against a
modified version of the musl C library that has been adapted to the new
system call interface [3].  This library can be used for testing on all
architectures supported by musl-1.1.21, but it is not how the support is
getting integrated into the official musl release. Official musl support is
planned but will require more invasive changes to the library.

Link: https://lore.kernel.org/lkml/20190110162435.309262-1-arnd@arndb.de/T/
Link: https://lore.kernel.org/lkml/20190118161835.2259170-1-arnd@arndb.de/
Link: https://git.linaro.org/people/arnd/musl-y2038.git/ [2]

2 files changed, 66 insertions, 25 deletions

diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
index 2c30e6f145ff..d1dd93436e1e 100644
--- a/arch/arm64/include/asm/unistd.h
+++ b/arch/arm64/include/asm/unistd.h
@@ -44,7 +44,7 @@
 #define __ARM_NR_compat_set_tls		(__ARM_NR_COMPAT_BASE + 5)
 #define __ARM_NR_COMPAT_END		(__ARM_NR_COMPAT_BASE + 0x800)
 
-#define __NR_compat_syscalls		402
+#define __NR_compat_syscalls		424
 #endif
 
 #define __ARCH_WANT_SYS_CLONE
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index d10cce69a4b0..5590f2623690 100644
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -270,7 +270,7 @@ __SYSCALL(__NR_uname, sys_newuname)
 			/* 123 was sys_modify_ldt */
 __SYSCALL(123, sys_ni_syscall)
 #define __NR_adjtimex 124
-__SYSCALL(__NR_adjtimex, compat_sys_adjtimex)
+__SYSCALL(__NR_adjtimex, sys_adjtimex_time32)
 #define __NR_mprotect 125
 __SYSCALL(__NR_mprotect, sys_mprotect)
 #define __NR_sigprocmask 126
@@ -344,9 +344,9 @@ __SYSCALL(__NR_sched_get_priority_max, sys_sched_get_priority_max)
 #define __NR_sched_get_priority_min 160
 __SYSCALL(__NR_sched_get_priority_min, sys_sched_get_priority_min)
 #define __NR_sched_rr_get_interval 161
-__SYSCALL(__NR_sched_rr_get_interval, compat_sys_sched_rr_get_interval)
+__SYSCALL(__NR_sched_rr_get_interval, sys_sched_rr_get_interval_time32)
 #define __NR_nanosleep 162
-__SYSCALL(__NR_nanosleep, compat_sys_nanosleep)
+__SYSCALL(__NR_nanosleep, sys_nanosleep_time32)
 #define __NR_mremap 163
 __SYSCALL(__NR_mremap, sys_mremap)
 #define __NR_setresuid 164
@@ -376,7 +376,7 @@ __SYSCALL(__NR_rt_sigprocmask, compat_sys_rt_sigprocmask)
 #define __NR_rt_sigpending 176
 __SYSCALL(__NR_rt_sigpending, compat_sys_rt_sigpending)
 #define __NR_rt_sigtimedwait 177
-__SYSCALL(__NR_rt_sigtimedwait, compat_sys_rt_sigtimedwait)
+__SYSCALL(__NR_rt_sigtimedwait, compat_sys_rt_sigtimedwait_time32)
 #define __NR_rt_sigqueueinfo 178
 __SYSCALL(__NR_rt_sigqueueinfo, compat_sys_rt_sigqueueinfo)
 #define __NR_rt_sigsuspend 179
@@ -502,7 +502,7 @@ __SYSCALL(__NR_tkill, sys_tkill)
 #define __NR_sendfile64 239
 __SYSCALL(__NR_sendfile64, sys_sendfile64)
 #define __NR_futex 240
-__SYSCALL(__NR_futex, compat_sys_futex)
+__SYSCALL(__NR_futex, sys_futex_time32)
 #define __NR_sched_setaffinity 241
 __SYSCALL(__NR_sched_setaffinity, compat_sys_sched_setaffinity)
 #define __NR_sched_getaffinity 242
@@ -512,7 +512,7 @@ __SYSCALL(__NR_io_setup, compat_sys_io_setup)
 #define __NR_io_destroy 244
 __SYSCALL(__NR_io_destroy, sys_io_destroy)
 #define __NR_io_getevents 245
-__SYSCALL(__NR_io_getevents, compat_sys_io_getevents)
+__SYSCALL(__NR_io_getevents, sys_io_getevents_time32)
 #define __NR_io_submit 246
 __SYSCALL(__NR_io_submit, compat_sys_io_submit)
 #define __NR_io_cancel 247
@@ -538,21 +538,21 @@ __SYSCALL(__NR_set_tid_address, sys_set_tid_address)
 #define __NR_timer_create 257
 __SYSCALL(__NR_timer_create, compat_sys_timer_create)
 #define __NR_timer_settime 258
-__SYSCALL(__NR_timer_settime, compat_sys_timer_settime)
+__SYSCALL(__NR_timer_settime, sys_timer_settime32)
 #define __NR_timer_gettime 259
-__SYSCALL(__NR_timer_gettime, compat_sys_timer_gettime)
+__SYSCALL(__NR_timer_gettime, sys_timer_gettime32)
 #define __NR_timer_getoverrun 260
 __SYSCALL(__NR_timer_getoverrun, sys_timer_getoverrun)
 #define __NR_timer_delete 261
 __SYSCALL(__NR_timer_delete, sys_timer_delete)
 #define __NR_clock_settime 262
-__SYSCALL(__NR_clock_settime, compat_sys_clock_settime)
+__SYSCALL(__NR_clock_settime, sys_clock_settime32)
 #define __NR_clock_gettime 263
-__SYSCALL(__NR_clock_gettime, compat_sys_clock_gettime)
+__SYSCALL(__NR_clock_gettime, sys_clock_gettime32)
 #define __NR_clock_getres 264
-__SYSCALL(__NR_clock_getres, compat_sys_clock_getres)
+__SYSCALL(__NR_clock_getres, sys_clock_getres_time32)
 #define __NR_clock_nanosleep 265
-__SYSCALL(__NR_clock_nanosleep, compat_sys_clock_nanosleep)
+__SYSCALL(__NR_clock_nanosleep, sys_clock_nanosleep_time32)
 #define __NR_statfs64 266
 __SYSCALL(__NR_statfs64, compat_sys_aarch32_statfs64)
 #define __NR_fstatfs64 267
@@ -560,7 +560,7 @@ __SYSCALL(__NR_fstatfs64, compat_sys_aarch32_fstatfs64)
 #define __NR_tgkill 268
 __SYSCALL(__NR_tgkill, sys_tgkill)
 #define __NR_utimes 269
-__SYSCALL(__NR_utimes, compat_sys_utimes)
+__SYSCALL(__NR_utimes, sys_utimes_time32)
 #define __NR_arm_fadvise64_64 270
 __SYSCALL(__NR_arm_fadvise64_64, compat_sys_aarch32_fadvise64_64)
 #define __NR_pciconfig_iobase 271
@@ -574,9 +574,9 @@ __SYSCALL(__NR_mq_open, compat_sys_mq_open)
 #define __NR_mq_unlink 275
 __SYSCALL(__NR_mq_unlink, sys_mq_unlink)
 #define __NR_mq_timedsend 276
-__SYSCALL(__NR_mq_timedsend, compat_sys_mq_timedsend)
+__SYSCALL(__NR_mq_timedsend, sys_mq_timedsend_time32)
 #define __NR_mq_timedreceive 277
-__SYSCALL(__NR_mq_timedreceive, compat_sys_mq_timedreceive)
+__SYSCALL(__NR_mq_timedreceive, sys_mq_timedreceive_time32)
 #define __NR_mq_notify 278
 __SYSCALL(__NR_mq_notify, compat_sys_mq_notify)
 #define __NR_mq_getsetattr 279
@@ -646,7 +646,7 @@ __SYSCALL(__NR_request_key, sys_request_key)
 #define __NR_keyctl 311
 __SYSCALL(__NR_keyctl, compat_sys_keyctl)
 #define __NR_semtimedop 312
-__SYSCALL(__NR_semtimedop, compat_sys_semtimedop)
+__SYSCALL(__NR_semtimedop, sys_semtimedop_time32)
 #define __NR_vserver 313
 __SYSCALL(__NR_vserver, sys_ni_syscall)
 #define __NR_ioprio_set 314
@@ -674,7 +674,7 @@ __SYSCALL(__NR_mknodat, sys_mknodat)
 #define __NR_fchownat 325
 __SYSCALL(__NR_fchownat, sys_fchownat)
 #define __NR_futimesat 326
-__SYSCALL(__NR_futimesat, compat_sys_futimesat)
+__SYSCALL(__NR_futimesat, sys_futimesat_time32)
 #define __NR_fstatat64 327
 __SYSCALL(__NR_fstatat64, sys_fstatat64)
 #define __NR_unlinkat 328
@@ -692,9 +692,9 @@ __SYSCALL(__NR_fchmodat, sys_fchmodat)
 #define __NR_faccessat 334
 __SYSCALL(__NR_faccessat, sys_faccessat)
 #define __NR_pselect6 335
-__SYSCALL(__NR_pselect6, compat_sys_pselect6)
+__SYSCALL(__NR_pselect6, compat_sys_pselect6_time32)
 #define __NR_ppoll 336
-__SYSCALL(__NR_ppoll, compat_sys_ppoll)
+__SYSCALL(__NR_ppoll, compat_sys_ppoll_time32)
 #define __NR_unshare 337
 __SYSCALL(__NR_unshare, sys_unshare)
 #define __NR_set_robust_list 338
@@ -718,7 +718,7 @@ __SYSCALL(__NR_epoll_pwait, compat_sys_epoll_pwait)
 #define __NR_kexec_load 347
 __SYSCALL(__NR_kexec_load, compat_sys_kexec_load)
 #define __NR_utimensat 348
-__SYSCALL(__NR_utimensat, compat_sys_utimensat)
+__SYSCALL(__NR_utimensat, sys_utimensat_time32)
 #define __NR_signalfd 349
 __SYSCALL(__NR_signalfd, compat_sys_signalfd)
 #define __NR_timerfd_create 350
@@ -728,9 +728,9 @@ __SYSCALL(__NR_eventfd, sys_eventfd)
 #define __NR_fallocate 352
 __SYSCALL(__NR_fallocate, compat_sys_aarch32_fallocate)
 #define __NR_timerfd_settime 353
-__SYSCALL(__NR_timerfd_settime, compat_sys_timerfd_settime)
+__SYSCALL(__NR_timerfd_settime, sys_timerfd_settime32)
 #define __NR_timerfd_gettime 354
-__SYSCALL(__NR_timerfd_gettime, compat_sys_timerfd_gettime)
+__SYSCALL(__NR_timerfd_gettime, sys_timerfd_gettime32)
 #define __NR_signalfd4 355
 __SYSCALL(__NR_signalfd4, compat_sys_signalfd4)
 #define __NR_eventfd2 356
@@ -752,7 +752,7 @@ __SYSCALL(__NR_rt_tgsigqueueinfo, compat_sys_rt_tgsigqueueinfo)
 #define __NR_perf_event_open 364
 __SYSCALL(__NR_perf_event_open, sys_perf_event_open)
 #define __NR_recvmmsg 365
-__SYSCALL(__NR_recvmmsg, compat_sys_recvmmsg)
+__SYSCALL(__NR_recvmmsg, compat_sys_recvmmsg_time32)
 #define __NR_accept4 366
 __SYSCALL(__NR_accept4, sys_accept4)
 #define __NR_fanotify_init 367
@@ -766,7 +766,7 @@ __SYSCALL(__NR_name_to_handle_at, sys_name_to_handle_at)
 #define __NR_open_by_handle_at 371
 __SYSCALL(__NR_open_by_handle_at, compat_sys_open_by_handle_at)
 #define __NR_clock_adjtime 372
-__SYSCALL(__NR_clock_adjtime, compat_sys_clock_adjtime)
+__SYSCALL(__NR_clock_adjtime, sys_clock_adjtime32)
 #define __NR_syncfs 373
 __SYSCALL(__NR_syncfs, sys_syncfs)
 #define __NR_sendmmsg 374
@@ -825,6 +825,47 @@ __SYSCALL(__NR_io_pgetevents, compat_sys_io_pgetevents)
 __SYSCALL(__NR_migrate_pages, compat_sys_migrate_pages)
 #define __NR_kexec_file_load 401
 __SYSCALL(__NR_kexec_file_load, sys_kexec_file_load)
+/* 402 is unused */
+#define __NR_clock_gettime64 403
+__SYSCALL(__NR_clock_gettime64, sys_clock_gettime)
+#define __NR_clock_settime64 404
+__SYSCALL(__NR_clock_settime64, sys_clock_settime)
+#define __NR_clock_adjtime64 405
+__SYSCALL(__NR_clock_adjtime64, sys_clock_adjtime)
+#define __NR_clock_getres_time64 406
+__SYSCALL(__NR_clock_getres_time64, sys_clock_getres)
+#define __NR_clock_nanosleep_time64 407
+__SYSCALL(__NR_clock_nanosleep_time64, sys_clock_nanosleep)
+#define __NR_timer_gettime64 408
+__SYSCALL(__NR_timer_gettime64, sys_timer_gettime)
+#define __NR_timer_settime64 409
+__SYSCALL(__NR_timer_settime64, sys_timer_settime)
+#define __NR_timerfd_gettime64 410
+__SYSCALL(__NR_timerfd_gettime64, sys_timerfd_gettime)
+#define __NR_timerfd_settime64 411
+__SYSCALL(__NR_timerfd_settime64, sys_timerfd_settime)
+#define __NR_utimensat_time64 412
+__SYSCALL(__NR_utimensat_time64, sys_utimensat)
+#define __NR_pselect6_time64 413
+__SYSCALL(__NR_pselect6_time64, compat_sys_pselect6_time64)
+#define __NR_ppoll_time64 414
+__SYSCALL(__NR_ppoll_time64, compat_sys_ppoll_time64)
+#define __NR_io_pgetevents_time64 416
+__SYSCALL(__NR_io_pgetevents_time64, sys_io_pgetevents)
+#define __NR_recvmmsg_time64 417
+__SYSCALL(__NR_recvmmsg_time64, compat_sys_recvmmsg_time64)
+#define __NR_mq_timedsend_time64 418
+__SYSCALL(__NR_mq_timedsend_time64, sys_mq_timedsend)
+#define __NR_mq_timedreceive_time64 419
+__SYSCALL(__NR_mq_timedreceive_time64, sys_mq_timedreceive)
+#define __NR_semtimedop_time64 420
+__SYSCALL(__NR_semtimedop_time64, sys_semtimedop)
+#define __NR_rt_sigtimedwait_time64 421
+__SYSCALL(__NR_rt_sigtimedwait_time64, compat_sys_rt_sigtimedwait_time64)
+#define __NR_futex_time64 422
+__SYSCALL(__NR_futex_time64, sys_futex)
+#define __NR_sched_rr_get_interval_time64 423
+__SYSCALL(__NR_sched_rr_get_interval_time64, sys_sched_rr_get_interval)
 
 /*
  * Please add new compat syscalls above this comment and update