Re: [PATCH 04/17] scsi: avoid useless free_list lock roundtrips

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On Wed, Feb 05, 2014 at 03:44:04PM -0800, James Bottomley wrote:
> Why do this?  cmd is still likely to be not NULL, which helps the
> compiler optimise.

Because testing for non-NULL pointers gets that hint implicitly from
gcc.

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