commit e09799ef03276b05ff2afec0e9a41f640ee6fae2
Author: Park Ju Hyung <qkrwngud825@gmail.com>
Date:   Tue Jul 9 16:15:31 2019 +0900

    alloc_stats: add reset

    Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>

diff --git a/mm/alloc_stats.c b/mm/alloc_stats.c
index d5f6fced27dd..c1940ba44075 100644
--- a/mm/alloc_stats.c
+++ b/mm/alloc_stats.c
@@ -121,9 +121,31 @@ static int alloc_stats_open(struct inode *inode, struct file *file)
    return single_open(file, alloc_stats_show, NULL);
 }

+static ssize_t alloc_stats_write(struct file *filp, const char __user *ubuf,
+                size_t len, loff_t *ppos)
+{
+   // Do nothing but reset counters at the moment
+   unsigned long flags;
+   int i, count;
+
+   spin_lock_irqsave(&stats_lock, flags);
+   count = ARRAY_SIZE(alloc_stats_g);
+
+   for (i = 0; i < count; i++) {
+       struct alloc_stats *stats = alloc_stats_g + i;
+
+       atomic_set(&stats->freed_samefunc, 0);
+       atomic_set(&stats->count, 0);
+   }
+   spin_unlock_irqrestore(&stats_lock, flags);
+
+   return len;
+}
+
 static const struct file_operations alloc_stats_fops = {
    .owner = THIS_MODULE,
    .open = alloc_stats_open,
+   .write = alloc_stats_write,
    .read = seq_read,
    .llseek = seq_lseek,
    .release = single_release