diff options
Diffstat (limited to 'lib/ref_tracker.c')
| -rw-r--r-- | lib/ref_tracker.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c index 42872f406b2a..73b606570cce 100644 --- a/lib/ref_tracker.c +++ b/lib/ref_tracker.c @@ -8,6 +8,7 @@ #include <linux/slab.h> #include <linux/stacktrace.h> #include <linux/stackdepot.h> +#include <linux/seq_file.h> #define REF_TRACKER_STACK_ENTRIES 16 #define STACK_BUF_SIZE 1024 @@ -66,6 +67,7 @@ struct ostream { void __ostream_printf (*func)(struct ostream *stream, char *fmt, ...); char *prefix; char *buf; + struct seq_file *seq; int size, used; }; @@ -301,6 +303,30 @@ EXPORT_SYMBOL_GPL(ref_tracker_free); static struct dentry *ref_tracker_debug_dir = (struct dentry *)-ENOENT; +static void __ostream_printf pr_ostream_seq(struct ostream *stream, char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + seq_vprintf(stream->seq, fmt, args); + va_end(args); +} + +static __maybe_unused int +ref_tracker_dir_seq_print(struct ref_tracker_dir *dir, struct seq_file *seq) +{ + struct ostream os = { .func = pr_ostream_seq, + .prefix = "", + .seq = seq }; + unsigned long flags; + + spin_lock_irqsave(&dir->lock, flags); + __ref_tracker_dir_pr_ostream(dir, 16, &os); + spin_unlock_irqrestore(&dir->lock, flags); + + return os.used; +} + static int __init ref_tracker_debugfs_init(void) { ref_tracker_debug_dir = debugfs_create_dir("ref_tracker", NULL); |