From: Peter.Benie@mvhi.com (Peter Benie)
To: linux-kernel@vger.kernel.org
Subject: Does cli() need to be called before reading avenrun?
Date: Thu, 2 Jan 2003 00:39:54 +0000 [thread overview]
Message-ID: <15891.35418.412034.594225@server.axiom.internal> (raw)
In kernel 2.4, in sys_sysinfo(), the code reads:
cli();
val.uptime = jiffies / HZ;
val.loads[0] = avenrun[0] << (SI_LOAD_SHIFT - FSHIFT);
val.loads[1] = avenrun[1] << (SI_LOAD_SHIFT - FSHIFT);
val.loads[2] = avenrun[2] << (SI_LOAD_SHIFT - FSHIFT);
val.procs = nr_threads-1;
sti();
In loadavg_read_proc, the code is in essence the same, except that it
isn't wrapped in cli/sti.
Is there a reason for the cli?
Peter
next reply other threads:[~2003-01-02 0:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-02 0:39 Peter Benie [this message]
2003-01-02 0:53 ` Robert Love
2003-01-02 10:38 ` Peter Benie
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