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mips: ath79: ar933x: Avoid warning with gcc5
GCC 5.3 report a warning: 'upper' and 'lower' may be used uninitialized in this function [-Wmaybe-uninitialized]. Compiler might need explicit initializer. Signed-off-by: Wills Wang <wills.wang@live.com>
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@ -268,6 +268,8 @@ void ddr_tap_tuning(void)
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dir = 1;
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tap = readl(regs + AR71XX_DDR_REG_TAP_CTRL0);
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val = tap;
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upper = tap;
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lower = tap;
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while (!done) {
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err = 0;
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