timer_list: Use printk format instead of open-coded symbol lookup

Use the "%ps" printk format string to resolve symbol names.

This works on all platforms, including ia64, ppc64 and parisc64 on which
one needs to dereference pointers to function descriptors instead of
function pointers.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20201104163401.GA3984@ls3530.fritz.box

diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index acb326f5f50a287a5fb2e2cc57cf55f9bca48700..6939140ab7c543e20697b9725fcbe1ec75041db8 100644 (file)
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -42,24 +42,11 @@ static void SEQ_printf(struct seq_file *m, const char *fmt, ...)
        va_end(args);
 }
 
-static void print_name_offset(struct seq_file *m, void *sym)
-{
-       char symname[KSYM_NAME_LEN];
-
-       if (lookup_symbol_name((unsigned long)sym, symname) < 0)
-               SEQ_printf(m, "<%pK>", sym);
-       else
-               SEQ_printf(m, "%s", symname);
-}
-
 static void
 print_timer(struct seq_file *m, struct hrtimer *taddr, struct hrtimer *timer,
            int idx, u64 now)
 {
-       SEQ_printf(m, " #%d: ", idx);
-       print_name_offset(m, taddr);
-       SEQ_printf(m, ", ");
-       print_name_offset(m, timer->function);
+       SEQ_printf(m, " #%d: <%pK>, %ps", idx, taddr, timer->function);
        SEQ_printf(m, ", S:%02x", timer->state);
        SEQ_printf(m, "\n");
        SEQ_printf(m, " # expires at %Lu-%Lu nsecs [in %Ld to %Ld nsecs]\n",
@@ -116,9 +103,7 @@ print_base(struct seq_file *m, struct hrtimer_clock_base *base, u64 now)
 
        SEQ_printf(m, "  .resolution: %u nsecs\n", hrtimer_resolution);
 
-       SEQ_printf(m,   "  .get_time:   ");
-       print_name_offset(m, base->get_time);
-       SEQ_printf(m,   "\n");
+       SEQ_printf(m,   "  .get_time:   %ps\n", base->get_time);
 #ifdef CONFIG_HIGH_RES_TIMERS
        SEQ_printf(m, "  .offset:     %Lu nsecs\n",
                   (unsigned long long) ktime_to_ns(base->offset));
@@ -218,42 +203,29 @@ print_tickdevice(struct seq_file *m, struct tick_device *td, int cpu)
        SEQ_printf(m, " next_event:     %Ld nsecs\n",
                   (unsigned long long) ktime_to_ns(dev->next_event));
 
-       SEQ_printf(m, " set_next_event: ");
-       print_name_offset(m, dev->set_next_event);
-       SEQ_printf(m, "\n");
+       SEQ_printf(m, " set_next_event: %ps\n", dev->set_next_event);
 
-       if (dev->set_state_shutdown) {
-               SEQ_printf(m, " shutdown: ");
-               print_name_offset(m, dev->set_state_shutdown);
-               SEQ_printf(m, "\n");
-       }
+       if (dev->set_state_shutdown)
+               SEQ_printf(m, " shutdown:       %ps\n",
+                       dev->set_state_shutdown);
 
-       if (dev->set_state_periodic) {
-               SEQ_printf(m, " periodic: ");
-               print_name_offset(m, dev->set_state_periodic);
-               SEQ_printf(m, "\n");
-       }
+       if (dev->set_state_periodic)
+               SEQ_printf(m, " periodic:       %ps\n",
+                       dev->set_state_periodic);
 
-       if (dev->set_state_oneshot) {
-               SEQ_printf(m, " oneshot:  ");
-               print_name_offset(m, dev->set_state_oneshot);
-               SEQ_printf(m, "\n");
-       }
+       if (dev->set_state_oneshot)
+               SEQ_printf(m, " oneshot:        %ps\n",
+                       dev->set_state_oneshot);
 
-       if (dev->set_state_oneshot_stopped) {
-               SEQ_printf(m, " oneshot stopped: ");
-               print_name_offset(m, dev->set_state_oneshot_stopped);
-               SEQ_printf(m, "\n");
-       }
+       if (dev->set_state_oneshot_stopped)
+               SEQ_printf(m, " oneshot stopped: %ps\n",
+                       dev->set_state_oneshot_stopped);
 
-       if (dev->tick_resume) {
-               SEQ_printf(m, " resume:   ");
-               print_name_offset(m, dev->tick_resume);
-               SEQ_printf(m, "\n");
-       }
+       if (dev->tick_resume)
+               SEQ_printf(m, " resume:         %ps\n",
+                       dev->tick_resume);
 
-       SEQ_printf(m, " event_handler:  ");
-       print_name_offset(m, dev->event_handler);
+       SEQ_printf(m, " event_handler:  %ps\n", dev->event_handler);
        SEQ_printf(m, "\n");
        SEQ_printf(m, " retries:        %lu\n", dev->retries);
        SEQ_printf(m, "\n");