Messages in this thread | | | Subject | Purpose of do{}while(0) in #define spin_lock_init(x) do { (x)->lock = 0; } while(0) | Date | Wed, 5 Jan 2005 19:31:44 +0530 | From | "Kotian, Deepak" <> |
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Just for information, may be very simple.
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.
Thanks and Regards Deepak
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