X-Git-Url: http://git.cascardo.eti.br/?a=blobdiff_plain;f=kernel%2Ftimer.c;h=761fb83d898839b44c4a4fe3a77ce98a8774e5e9;hb=014b3bd6dd20cf60ebffbfef8fc7a91fba1703c7;hp=a297ffcf888eb20093b0609485e03edbd85cd214;hpb=44a683971119bafb5bc30778f92ee773680ebb6f;p=cascardo%2Flinux.git

diff --git a/kernel/timer.c b/kernel/timer.c
index a297ffcf888e..761fb83d8988 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -40,6 +40,7 @@
 #include <linux/irq_work.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/module.h>
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -1790,6 +1791,9 @@ void __init init_timers(void)
 	open_softirq(TIMER_SOFTIRQ, run_timer_softirq);
 }
 
+static int debug_msleep;
+module_param(debug_msleep, int, 0);
+
 /**
  * msleep - sleep safely even with waitqueue interruptions
  * @msecs: Time in milliseconds to sleep for
@@ -1798,6 +1802,9 @@ void msleep(unsigned int msecs)
 {
 	unsigned long timeout = msecs_to_jiffies(msecs) + 1;
 
+	if (debug_msleep && msecs >= debug_msleep)
+		WARN(1, "Long sleep detected (%d msec)\n", msecs);
+
 	while (timeout)
 		timeout = schedule_timeout_uninterruptible(timeout);
 }