add support 4g -- >ppp

hc

2023-11-24 2b26ab132d1b33b91c84c6d732456200e8c5ee77

 kernel/fs/autofs/expire.c
..
..
@@ -8,6 +8,7 @@
8
8
  * option, any later version, incorporated herein by reference.
9
9
  */
10
10
 
11
+#include <linux/delay.h>
11
12
 #include "autofs_i.h"
12
13
 
13
14
 /* Check if a dentry can be expired */
..
..
@@ -153,7 +154,7 @@
153
154
 			parent = p->d_parent;
154
155
 			if (!spin_trylock(&parent->d_lock)) {
155
156
 				spin_unlock(&p->d_lock);
156
-				cpu_relax();
157
+				cpu_chill();
157
158
 				goto relock;
158
159
 			}
159
160
 			spin_unlock(&p->d_lock);