posix-timers: Kill ->nsleep_restart()

No more users.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170607084241.28657-8-viro@ZenIV.linux.org.uk

include/linux/hrtimer.h

@@ -457,7 +457,6 @@ extern int nanosleep_copyout(struct restart_block *, struct timespec *);
 extern long hrtimer_nanosleep(struct timespec64 *rqtp,
 			      const enum hrtimer_mode mode,
 			      const clockid_t clockid);
-extern long hrtimer_nanosleep_restart(struct restart_block *restart_block);
 
 extern void hrtimer_init_sleeper(struct hrtimer_sleeper *sl,
 				 struct task_struct *tsk);

kernel/time/hrtimer.c

@@ -1496,7 +1496,7 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod
 	return -ERESTART_RESTARTBLOCK;
 }
 
-long __sched hrtimer_nanosleep_restart(struct restart_block *restart)
+static long __sched hrtimer_nanosleep_restart(struct restart_block *restart)
 {
 	struct hrtimer_sleeper t;
 	int ret;

kernel/time/posix-cpu-timers.c

@@ -1386,10 +1386,6 @@ static int process_cpu_nsleep(const clockid_t which_clock, int flags,
 {
 	return posix_cpu_nsleep(PROCESS_CLOCK, flags, rqtp);
 }
-static long process_cpu_nsleep_restart(struct restart_block *restart_block)
-{
-	return -EINVAL;
-}
 static int thread_cpu_clock_getres(const clockid_t which_clock,
 				   struct timespec64 *tp)
 {
@@ -1412,7 +1408,6 @@ const struct k_clock clock_posix_cpu = {
 	.clock_get	= posix_cpu_clock_get,
 	.timer_create	= posix_cpu_timer_create,
 	.nsleep		= posix_cpu_nsleep,
-	.nsleep_restart	= posix_cpu_nsleep_restart,
 	.timer_set	= posix_cpu_timer_set,
 	.timer_del	= posix_cpu_timer_del,
 	.timer_get	= posix_cpu_timer_get,
@@ -1424,7 +1419,6 @@ const struct k_clock clock_process = {
 	.clock_get	= process_cpu_clock_get,
 	.timer_create	= process_cpu_timer_create,
 	.nsleep		= process_cpu_nsleep,
-	.nsleep_restart	= process_cpu_nsleep_restart,
 };
 
 const struct k_clock clock_thread = {

kernel/time/posix-timers.c

@@ -1111,7 +1111,6 @@ static const struct k_clock clock_realtime = {
 	.clock_set		= posix_clock_realtime_set,
 	.clock_adj		= posix_clock_realtime_adj,
 	.nsleep			= common_nsleep,
-	.nsleep_restart		= hrtimer_nanosleep_restart,
 	.timer_create		= common_timer_create,
 	.timer_set		= common_timer_set,
 	.timer_get		= common_timer_get,
@@ -1127,7 +1126,6 @@ static const struct k_clock clock_monotonic = {
 	.clock_getres		= posix_get_hrtimer_res,
 	.clock_get		= posix_ktime_get_ts,
 	.nsleep			= common_nsleep,
-	.nsleep_restart		= hrtimer_nanosleep_restart,
 	.timer_create		= common_timer_create,
 	.timer_set		= common_timer_set,
 	.timer_get		= common_timer_get,
@@ -1158,7 +1156,6 @@ static const struct k_clock clock_tai = {
 	.clock_getres		= posix_get_hrtimer_res,
 	.clock_get		= posix_get_tai,
 	.nsleep			= common_nsleep,
-	.nsleep_restart		= hrtimer_nanosleep_restart,
 	.timer_create		= common_timer_create,
 	.timer_set		= common_timer_set,
 	.timer_get		= common_timer_get,
@@ -1174,7 +1171,6 @@ static const struct k_clock clock_boottime = {
 	.clock_getres		= posix_get_hrtimer_res,
 	.clock_get		= posix_get_boottime,
 	.nsleep			= common_nsleep,
-	.nsleep_restart		= hrtimer_nanosleep_restart,
 	.timer_create		= common_timer_create,
 	.timer_set		= common_timer_set,
 	.timer_get		= common_timer_get,

kernel/time/posix-timers.h

@@ -11,7 +11,6 @@ struct k_clock {
 	int	(*timer_create)(struct k_itimer *timer);
 	int	(*nsleep)(const clockid_t which_clock, int flags,
 			  struct timespec64 *);
-	long	(*nsleep_restart)(struct restart_block *restart_block);
 	int	(*timer_set)(struct k_itimer *timr, int flags,
 			     struct itimerspec64 *new_setting,
 			     struct itimerspec64 *old_setting);