Attachment #304779 for bug #217626

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	unsigned long flags;
	unsigned char seconds;

	for (i = 0; i < 100000; i++) {
		spin_lock_irqsave(&rtc_lock, flags);

		/*

		}
		spin_unlock_irqrestore(&rtc_lock, flags);

		if (WARN_ON(i >= 100)) {
			pr_warn("%s: reading the RTC time required %d loop iterations",
				__func__, i);
		}

		return true;
	}
	WARN_ON(1);
	return false;
}
EXPORT_SYMBOL_GPL(mc146818_avoid_UIP);
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Return to bug 217626

Lines 21-27 bool mc146818_avoid_UIP(void (callback)(unsigned char seconds, void param), Link Here

(-)a/drivers/rtc/rtc-mc146818-lib.c (-2 / +7 lines)
21	unsigned long flags;	21	unsigned long flags;
22	unsigned char seconds;	22	unsigned char seconds;
23		23
24	for (i = 0; i < 100; i++) {	24	for (i = 0; i < 100000; i++) {
25	spin_lock_irqsave(&rtc_lock, flags);	25	spin_lock_irqsave(&rtc_lock, flags);
26		26
27	/*	27	/*
Lines 72-79 bool mc146818_avoid_UIP(void (callback)(unsigned char seconds, void param), Link Here
72	}	72	}
73	spin_unlock_irqrestore(&rtc_lock, flags);	73	spin_unlock_irqrestore(&rtc_lock, flags);
74		74
		75	if (WARN_ON(i >= 100)) {
		76	pr_warn("%s: reading the RTC time required %d loop iterations",
		77	__func__, i);
		78	}
		79
75	return true;	80	return true;
76	}	81	}
		82	WARN_ON(1);
77	return false;	83	return false;
78	}	84	}
79	EXPORT_SYMBOL_GPL(mc146818_avoid_UIP);	85	EXPORT_SYMBOL_GPL(mc146818_avoid_UIP);
80	-