Merge tag 'y2038-for-4.21' of ssh://gitolite.kernel.org:/pub/scm/linux/kernel/git/arnd/playground

Pull y2038 updates from Arnd Bergmann:
 "More syscalls and cleanups

  This concludes the main part of the system call rework for 64-bit
  time_t, which has spread over most of year 2018, the last six system
  calls being

    - ppoll
    - pselect6
    - io_pgetevents
    - recvmmsg
    - futex
    - rt_sigtimedwait

  As before, nothing changes for 64-bit architectures, while 32-bit
  architectures gain another entry point that differs only in the layout
  of the timespec structure. Hopefully in the next release we can wire
  up all 22 of those system calls on all 32-bit architectures, which
  gives us a baseline version for glibc to start using them.

  This does not include the clock_adjtime, getrusage/waitid, and
  getitimer/setitimer system calls. I still plan to have new versions of
  those as well, but they are not required for correct operation of the
  C library since they can be emulated using the old 32-bit time_t based
  system calls.

  Aside from the system calls, there are also a few cleanups here,
  removing old kernel internal interfaces that have become unused after
  all references got removed. The arch/sh cleanups are part of this,
  there were posted several times over the past year without a reaction
  from the maintainers, while the corresponding changes made it into all
  other architectures"

* tag 'y2038-for-4.21' of ssh://gitolite.kernel.org:/pub/scm/linux/kernel/git/arnd/playground:
  timekeeping: remove obsolete time accessors
  vfs: replace current_kernel_time64 with ktime equivalent
  timekeeping: remove timespec_add/timespec_del
  timekeeping: remove unused {read,update}_persistent_clock
  sh: remove board_time_init() callback
  sh: remove unused rtc_sh_get/set_time infrastructure
  sh: sh03: rtc: push down rtc class ops into driver
  sh: dreamcast: rtc: push down rtc class ops into driver
  y2038: signal: Add compat_sys_rt_sigtimedwait_time64
  y2038: signal: Add sys_rt_sigtimedwait_time32
  y2038: socket: Add compat_sys_recvmmsg_time64
  y2038: futex: Add support for __kernel_timespec
  y2038: futex: Move compat implementation into futex.c
  io_pgetevents: use __kernel_timespec
  pselect6: use __kernel_timespec
  ppoll: use __kernel_timespec
  signal: Add restore_user_sigmask()
  signal: Add set_user_sigmask()

1 files changed, 24 insertions, 5 deletions

diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 2ac3d13a915b..251979d2e709 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -296,12 +296,18 @@ asmlinkage long sys_io_getevents(aio_context_t ctx_id,
 				long min_nr,
 				long nr,
 				struct io_event __user *events,
-				struct timespec __user *timeout);
+				struct __kernel_timespec __user *timeout);
 asmlinkage long sys_io_pgetevents(aio_context_t ctx_id,
 				long min_nr,
 				long nr,
 				struct io_event __user *events,
-				struct timespec __user *timeout,
+				struct __kernel_timespec __user *timeout,
+				const struct __aio_sigset *sig);
+asmlinkage long sys_io_pgetevents_time32(aio_context_t ctx_id,
+				long min_nr,
+				long nr,
+				struct io_event __user *events,
+				struct old_timespec32 __user *timeout,
 				const struct __aio_sigset *sig);
 
 /* fs/xattr.c */
@@ -466,10 +472,16 @@ asmlinkage long sys_sendfile64(int out_fd, int in_fd,
 
 /* fs/select.c */
 asmlinkage long sys_pselect6(int, fd_set __user *, fd_set __user *,
-			     fd_set __user *, struct timespec __user *,
+			     fd_set __user *, struct __kernel_timespec __user *,
+			     void __user *);
+asmlinkage long sys_pselect6_time32(int, fd_set __user *, fd_set __user *,
+			     fd_set __user *, struct old_timespec32 __user *,
 			     void __user *);
 asmlinkage long sys_ppoll(struct pollfd __user *, unsigned int,
-			  struct timespec __user *, const sigset_t __user *,
+			  struct __kernel_timespec __user *, const sigset_t __user *,
+			  size_t);
+asmlinkage long sys_ppoll_time32(struct pollfd __user *, unsigned int,
+			  struct old_timespec32 __user *, const sigset_t __user *,
 			  size_t);
 
 /* fs/signalfd.c */
@@ -541,7 +553,7 @@ asmlinkage long sys_unshare(unsigned long unshare_flags);
 
 /* kernel/futex.c */
 asmlinkage long sys_futex(u32 __user *uaddr, int op, u32 val,
-			struct timespec __user *utime, u32 __user *uaddr2,
+			struct __kernel_timespec __user *utime, u32 __user *uaddr2,
 			u32 val3);
 asmlinkage long sys_get_robust_list(int pid,
 				    struct robust_list_head __user * __user *head_ptr,
@@ -637,6 +649,10 @@ asmlinkage long sys_rt_sigtimedwait(const sigset_t __user *uthese,
 				siginfo_t __user *uinfo,
 				const struct __kernel_timespec __user *uts,
 				size_t sigsetsize);
+asmlinkage long sys_rt_sigtimedwait_time32(const sigset_t __user *uthese,
+				siginfo_t __user *uinfo,
+				const struct old_timespec32 __user *uts,
+				size_t sigsetsize);
 asmlinkage long sys_rt_sigqueueinfo(pid_t pid, int sig, siginfo_t __user *uinfo);
 
 /* kernel/sys.c */
@@ -831,6 +847,9 @@ asmlinkage long sys_accept4(int, struct sockaddr __user *, int __user *, int);
 asmlinkage long sys_recvmmsg(int fd, struct mmsghdr __user *msg,
 			     unsigned int vlen, unsigned flags,
 			     struct __kernel_timespec __user *timeout);
+asmlinkage long sys_recvmmsg_time32(int fd, struct mmsghdr __user *msg,
+			     unsigned int vlen, unsigned flags,
+			     struct old_timespec32 __user *timeout);
 
 asmlinkage long sys_wait4(pid_t pid, int __user *stat_addr,
 				int options, struct rusage __user *ru);