Messages in this thread |  | | | From | Tabi Timur-B04825 <> | | Subject | Re: [PATCH v3.1] [resend] Resurrect Intel740 driver: i740fb | | Date | Sun, 4 Dec 2011 02:35:59 +0000 |
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On Sat, Dec 3, 2011 at 3:45 PM, Florian Tobias Schandinat <FlorianSchandinat@gmx.de> wrote: > >> + return !!(i740inreg(par, XRX, REG_DDC_STATE) & DDC_SCL); > > Why "!!"?
This is a trick that guarantees that the return value is either 0 or 1. Without the !!, the return value will be either 0 or DDC_SCL.
-- Timur Tabi Linux kernel developer at Freescale -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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