Re: [PATCH] kvm tools: remove unneeded checks in qcow code

From: Jesper Juhl
Date: Fri Dec 21 2012 - 17:03:06 EST


On Thu, 20 Dec 2012, Sasha Levin wrote:

> We already know q!=NULL at that point, no need to retest.
>
Right, and even if it was ==NULL then 'free(NULL)' is guaranteed to be a
NOP, so it would still be fine.

Reviewed-by: Jesper Juhl <jj@xxxxxxxxxxxxx>


> Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
> ---
> tools/kvm/disk/qcow.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/tools/kvm/disk/qcow.c b/tools/kvm/disk/qcow.c
> index ee2992e..64a2550 100644
> --- a/tools/kvm/disk/qcow.c
> +++ b/tools/kvm/disk/qcow.c
> @@ -1361,8 +1361,7 @@ free_header:
> if (q->header)
> free(q->header);
> free_qcow:
> - if (q)
> - free(q);
> + free(q);
>
> return NULL;
> }
> @@ -1492,8 +1491,7 @@ free_header:
> if (q->header)
> free(q->header);
> free_qcow:
> - if (q)
> - free(q);
> + free(q);
>
> return NULL;
> }
>

--
Jesper Juhl <jj@xxxxxxxxxxxxx> http://www.chaosbits.net/
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