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    Subject[PATCH 3/13] use cpu_relax() in busy loop
    Replace busy loop nop with cpu_relax().

    ===== drivers/block/ps2esdi.c 1.69 vs edited =====
    --- 1.69/drivers/block/ps2esdi.c Wed Sep 10 18:18:39 2003
    +++ edited/drivers/block/ps2esdi.c Thu Sep 18 10:45:34 2003
    @@ -550,7 +550,8 @@
    printk("%s: hard reset...\n", DEVICE_NAME);
    outb_p(CTRL_HARD_RESET, ESDI_CONTROL);
    expire = jiffies + 2*HZ;
    - while (time_before(jiffies, expire));
    + while (time_before(jiffies, expire))
    + cpu_relax();
    outb_p(1, ESDI_CONTROL);
    } /* hard reset */

    -
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