From: Andrew Morton <akpm@osdl.org>
To: Georg Chini <georg.chini@triaton-webhosting.com>
Cc: linux-kernel@vger.kernel.org, Pete Zaitcev <zaitcev@redhat.com>
Subject: Re: Sparc32 - sched_clock missing
Date: Sat, 4 Oct 2003 11:54:55 -0700 [thread overview]
Message-ID: <20031004115455.42d8263e.akpm@osdl.org> (raw)
In-Reply-To: <3F7ED071.7080005@triaton-webhosting.com>
Georg Chini <georg.chini@triaton-webhosting.com> wrote:
>
> Hello out there,
>
> tried to build Kernel 2.6.0-test6-bk4 on my
> sparc32 machine and found that the function
> sched_clock is missing in time.c. Can anyone
> tell me what I have to put there? Please CC
> to me.
>
This is the minimal version to get you going.
A better implementation would use a higer-resolution counter, if the
hardware has such a thing.
diff -puN arch/sparc/kernel/time.c~sparc32-sched_clock arch/sparc/kernel/time.c
--- 25/arch/sparc/kernel/time.c~sparc32-sched_clock 2003-10-04 11:53:19.000000000 -0700
+++ 25-akpm/arch/sparc/kernel/time.c 2003-10-04 11:53:41.000000000 -0700
@@ -617,3 +617,12 @@ static int set_rtc_mmss(unsigned long no
return -1;
}
}
+
+/*
+ * Returns nanoseconds
+ */
+
+unsigned long long sched_clock(void)
+{
+ return (unsigned long long)jiffies * (1000000000 / HZ);
+}
_
next prev parent reply other threads:[~2003-10-04 18:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-04 13:51 Sparc32 - sched_clock missing Georg Chini
2003-10-04 18:54 ` Andrew Morton [this message]
2003-10-04 20:20 ` Georg Chini
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