From 28777432d2d1dcd7519131c6176bdc662f917254 Mon Sep 17 00:00:00 2001 From: Thadeu Lima de Souza Cascardo Date: Thu, 20 May 2010 17:47:52 -0400 Subject: [PATCH] Using udelay to busy wait for about 10 seconds. --- hellochar.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/hellochar.c b/hellochar.c index a197a1d..7f659f5 100644 --- a/hellochar.c +++ b/hellochar.c @@ -39,9 +39,9 @@ static int hello_open(struct inode *ino, struct file *fp) static ssize_t hello_read(struct file *fp, char __user *buf, size_t sz, loff_t *pos) { - unsigned long expire = jiffies + 5 * HZ; - while (time_after(expire, jiffies)) - cpu_relax(); + int i = 1 << 20; + while (i--) + udelay(10); return 0; } -- 2.20.1