(0 == foo), rather than (foo == 0)

[Godbole, Amarendra (GE Consumer & Industrial)]

Hi,

While writing code, the assignment operator (=) is many-a-times confused with the comparison operator (==) resulting in very subtle bugs difficult to track. To keep a check on this -- the constant can be written on the LHS rather than the RHS which will result in a compile time error if wrong operator is used.

Is this an encouraged practice while writing any code for the kernel ? Or is this choice left to the developer ? I was unable to find any reference to it in the CodingStyle document. I did find some code under drivers/ which used (NULL == foo) and similar constructs. 

Can this be added to the CodingStyle document ?

Cheers,
Amarendra

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