ref_tracker: don't use %pK in pr_ostream() output

As Thomas Weißschuh points out [1], it is now preferable to use %p
instead of hashed pointers with printk(), since raw pointers should no
longer be leaked into the kernel log. Change the ref_tracker
infrastructure to use %p instead of %pK in its formats.

[1]: https://lore.kernel.org/netdev/20250414-restricted-pointers-net-v1-0-12af0ce46cdd@linutronix.de/

Reviewed-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Reviewed-by: Krzysztof Karas <krzysztof.karas@intel.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://patch.msgid.link/20250618-reftrack-dbgfs-v15-1-24fc37ead144@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c
index cf5609b1ca79361763abe5a3a98484a3ee591ff2..de71439e12a3bab6456910986fa611dfbdd97980 100644 (file)
--- a/lib/ref_tracker.c
+++ b/lib/ref_tracker.c
@@ -96,7 +96,7 @@ __ref_tracker_dir_pr_ostream(struct ref_tracker_dir *dir,
 
        stats = ref_tracker_get_stats(dir, display_limit);
        if (IS_ERR(stats)) {
-               pr_ostream(s, "%s@%pK: couldn't get stats, error %pe\n",
+               pr_ostream(s, "%s@%p: couldn't get stats, error %pe\n",
                           dir->name, dir, stats);
                return;
        }
@@ -107,13 +107,13 @@ __ref_tracker_dir_pr_ostream(struct ref_tracker_dir *dir,
                stack = stats->stacks[i].stack_handle;
                if (sbuf && !stack_depot_snprint(stack, sbuf, STACK_BUF_SIZE, 4))
                        sbuf[0] = 0;
-               pr_ostream(s, "%s@%pK has %d/%d users at\n%s\n", dir->name, dir,
+               pr_ostream(s, "%s@%p has %d/%d users at\n%s\n", dir->name, dir,
                           stats->stacks[i].count, stats->total, sbuf);
                skipped -= stats->stacks[i].count;
        }
 
        if (skipped)
-               pr_ostream(s, "%s@%pK skipped reports about %d/%d users.\n",
+               pr_ostream(s, "%s@%p skipped reports about %d/%d users.\n",
                           dir->name, dir, skipped, stats->total);
 
        kfree(sbuf);