fs/proc.c: use rb_entry_safe() instead of rb_entry()

Better to use existing macro that rewriting them.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 12 deletions

diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index be39c6feb3e5..7fea13229f33 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -41,22 +41,14 @@ static int proc_match(unsigned int len, const char *name, struct proc_dir_entry
 
 static struct proc_dir_entry *pde_subdir_first(struct proc_dir_entry *dir)
 {
-        struct rb_node *node = rb_first(&dir->subdir);
-
-        if (node == NULL)
-                return NULL;
-
-        return rb_entry(node, struct proc_dir_entry, subdir_node);
+        return rb_entry_safe(rb_first(&dir->subdir), struct proc_dir_entry,
+                             subdir_node);
 }
 
 static struct proc_dir_entry *pde_subdir_next(struct proc_dir_entry *dir)
 {
-        struct rb_node *node = rb_next(&dir->subdir_node);
-
-        if (node == NULL)
-                return NULL;
-
-        return rb_entry(node, struct proc_dir_entry, subdir_node);
+        return rb_entry_safe(rb_next(&dir->subdir_node), struct proc_dir_entry,
+                             subdir_node);
 }
 
 static struct proc_dir_entry *pde_subdir_find(struct proc_dir_entry *dir,