[Qemu-devel] Re: [PATCH 05/14] Remove unused argument for check_for_block_signature()

[Paolo Bonzini]

On 08/30/2010 06:16 PM, Anthony Liguori wrote:
> This is why this type of warning sucks.  Passing BlockDriverState is a
> matter of readability because these are roughly methods.  Just because
> 'this' isn't used right now, doesn't mean that it should not be a method.

On the contrary, to me this is acceptable (or even "a good thing") 
because a patch introducing the first use of a so-far-unused argument 
deserves a more careful review.  In fact, if we were using C++, 
check_for_block_signature should have been static.

The cases where the "this" argument is unused in a method should stand 
out as possible bugs, as is the case with the parse errors in the JSON 
parser (which _is_ a bug, as the caller cannot intercept error messages 
right now).  check_for_block_signature is not one of these.

Paolo