Messages in this thread | | | Date | Wed, 5 Jan 2005 15:14:23 +0100 | From | Paolo Ornati <> | Subject | Re: Purpose of do{}while(0) in #define spin_lock_init(x) do { (x)->lock = 0; } while(0) |
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On Wed, 5 Jan 2005 19:31:44 +0530 "Kotian, Deepak" <Deepak.Kotian@patni.com> wrote:
> Is there any specific reason why do{}while(0) is > there in this definition > #define spin_lock_init(x) do { (x)->lock = 0; } while(0) > > What could happen if it is replaced by > #define spin_lock_init(x) { (x)->lock = 0; } > > There are couple of other places, where this kind of usage > is observed in the kernel code.
look at http://www.kernelnewbies.org/faq/
-- Paolo Ornati Gentoo Linux (kernel 2.6.10-cko2) - 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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