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SubjectPurpose of do{}while(0) in #define spin_lock_init(x) do { (x)->lock = 0; } while(0)
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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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