Messages in this thread | | | Date | Thu, 2 Jan 2003 00:39:54 +0000 | From | (Peter Benie) | Subject | Does cli() need to be called before reading avenrun? |
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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?
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