Re: [PATCH] sched: fix never executed code due to expression always false

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



* Jesper Juhl <[email protected]> wrote:

> As per this patch perhaps? : 
> 
> Signed-off-by: Jesper Juhl <[email protected]>

this is still not enough (there was one more comparison to cover). Also, 
it's a bit cleaner to just cast the left side to signed than cast every 
member separately.

	Ingo

--

fix signed comparisons of long long.

Signed-off-by: Jesper Juhl <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>

--- linux/kernel/sched.c.orig
+++ linux/kernel/sched.c
@@ -2695,9 +2695,9 @@ need_resched_nonpreemptible:
 
 	schedstat_inc(rq, sched_cnt);
 	now = sched_clock();
-	if (likely((long long)now - prev->timestamp < NS_MAX_SLEEP_AVG)) {
+	if (likely((long long)(now - prev->timestamp) < NS_MAX_SLEEP_AVG)) {
 		run_time = now - prev->timestamp;
-		if (unlikely((long long)now - prev->timestamp < 0))
+		if (unlikely((long long)(now - prev->timestamp) < 0))
 			run_time = 0;
 	} else
 		run_time = NS_MAX_SLEEP_AVG;
@@ -2775,7 +2775,7 @@ go_idle:
 
 	if (!rt_task(next) && next->activated > 0) {
 		unsigned long long delta = now - next->timestamp;
-		if (unlikely((long long)now - next->timestamp < 0))
+		if (unlikely((long long)(now - next->timestamp) < 0))
 			delta = 0;
 
 		if (next->activated == 1)
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux