Merge branch 'slab/urgent' into for-linus

[karo-tx-linux.git] / kernel / trace / ftrace.c

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index cde74b9973b72269217c858d79fbccb5872e8066..f3716bf04df648418b5f8dc246d54c958097baaf 100644 (file)
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -291,7 +291,9 @@ function_stat_next(void *v, int idx)
        pg = (struct ftrace_profile_page *)((unsigned long)rec & PAGE_MASK);
 
  again:
-       rec++;
+       if (idx != 0)
+               rec++;
+
        if ((void *)rec >= (void *)&pg->records[pg->index]) {
                pg = pg->next;
                if (!pg)
@@ -1417,10 +1419,20 @@ static void *t_hash_start(struct seq_file *m, loff_t *pos)
 {
        struct ftrace_iterator *iter = m->private;
        void *p = NULL;
+       loff_t l;
+
+       if (!(iter->flags & FTRACE_ITER_HASH))
+               *pos = 0;
 
        iter->flags |= FTRACE_ITER_HASH;
 
-       return t_hash_next(m, p, pos);
+       iter->hidx = 0;
+       for (l = 0; l <= *pos; ) {
+               p = t_hash_next(m, p, &l);
+               if (!p)
+                       break;
+       }
+       return p;
 }
 
 static int t_hash_show(struct seq_file *m, void *v)
@@ -1467,8 +1479,6 @@ t_next(struct seq_file *m, void *v, loff_t *pos)
                        iter->pg = iter->pg->next;
                        iter->idx = 0;
                        goto retry;
-               } else {
-                       iter->idx = -1;
                }
        } else {
                rec = &iter->pg->records[iter->idx++];
@@ -1497,6 +1507,7 @@ static void *t_start(struct seq_file *m, loff_t *pos)
 {
        struct ftrace_iterator *iter = m->private;
        void *p = NULL;
+       loff_t l;
 
        mutex_lock(&ftrace_lock);
        /*
@@ -1508,23 +1519,21 @@ static void *t_start(struct seq_file *m, loff_t *pos)
                if (*pos > 0)
                        return t_hash_start(m, pos);
                iter->flags |= FTRACE_ITER_PRINTALL;
-               (*pos)++;
                return iter;
        }
 
        if (iter->flags & FTRACE_ITER_HASH)
                return t_hash_start(m, pos);
 
-       if (*pos > 0) {
-               if (iter->idx < 0)
-                       return p;
-               (*pos)--;
-               iter->idx--;
+       iter->pg = ftrace_pages_start;
+       iter->idx = 0;
+       for (l = 0; l <= *pos; ) {
+               p = t_next(m, p, &l);
+               if (!p)
+                       break;
        }
 
-       p = t_next(m, p, pos);
-
-       if (!p)
+       if (!p && iter->flags & FTRACE_ITER_FILTER)
                return t_hash_start(m, pos);
 
        return p;