posix-timers: Polish coding style in a few places

Make it consistent with the TIP tree documentation.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20230425183313.888493625@linutronix.de

kernel/time/posix-timers.c

@@ -309,10 +309,10 @@ int posix_timer_event(struct k_itimer *timr, int si_private)
  */
 static enum hrtimer_restart posix_timer_fn(struct hrtimer *timer)
 {
+	enum hrtimer_restart ret = HRTIMER_NORESTART;
 	struct k_itimer *timr;
 	unsigned long flags;
 	int si_private = 0;
-	enum hrtimer_restart ret = HRTIMER_NORESTART;
 
 	timr = container_of(timer, struct k_itimer, it.real.timer);
 	spin_lock_irqsave(&timr->it_lock, flags);
@@ -400,8 +400,8 @@ static struct pid *good_sigevent(sigevent_t * event)
 
 static struct k_itimer * alloc_posix_timer(void)
 {
-	struct k_itimer *tmr;
-	tmr = kmem_cache_zalloc(posix_timers_cache, GFP_KERNEL);
+	struct k_itimer *tmr = kmem_cache_zalloc(posix_timers_cache, GFP_KERNEL);
+
 	if (!tmr)
 		return tmr;
 	if (unlikely(!(tmr->sigq = sigqueue_alloc()))) {
@@ -695,8 +695,8 @@ void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting)
 
 static int do_timer_gettime(timer_t timer_id,  struct itimerspec64 *setting)
 {
-	struct k_itimer *timr;
 	const struct k_clock *kc;
+	struct k_itimer *timr;
 	unsigned long flags;
 	int ret = 0;
 
@@ -767,8 +767,8 @@ SYSCALL_DEFINE2(timer_gettime32, timer_t, timer_id,
 SYSCALL_DEFINE1(timer_getoverrun, timer_t, timer_id)
 {
 	struct k_itimer *timr;
-	int overrun;
 	unsigned long flags;
+	int overrun;
 
 	timr = lock_timer(timer_id, &flags);
 	if (!timr)
@@ -941,8 +941,7 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags,
 		const struct __kernel_itimerspec __user *, new_setting,
 		struct __kernel_itimerspec __user *, old_setting)
 {
-	struct itimerspec64 new_spec, old_spec;
-	struct itimerspec64 *rtn = old_setting ? &old_spec : NULL;
+	struct itimerspec64 new_spec, old_spec, *rtn;
 	int error = 0;
 
 	if (!new_setting)
@@ -951,6 +950,7 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags,
 	if (get_itimerspec64(&new_spec, new_setting))
 		return -EFAULT;
 
+	rtn = old_setting ? &old_spec : NULL;
 	error = do_timer_settime(timer_id, flags, &new_spec, rtn);
 	if (!error && old_setting) {
 		if (put_itimerspec64(&old_spec, old_setting))