linux-kernel - Re: [PATCH] scsi: target: iscsi: Drop unnecessary container

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Message-ID: <yq17dk0btvt.fsf@ca-mkp.ca.oracle.com>
Date:   Fri, 14 May 2021 22:42:08 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     "Martin K . Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org, Hou Pu <houpu@...edance.com>,
        Mike Christie <michael.christie@...cle.com>
Subject: Re: [PATCH] scsi: target: iscsi: Drop unnecessary container_of


Guenter,

> The structure pointer passed to container_of() is never NULL; that was
> already checked. That means that the result of container_of()
> operations on it is also never NULL, even though se_node_acl is the
> first element of the structure embedding it. On top of that, it is
> misleading to perform a NULL check on the result of container_of()
> because the position of the contained element could change, which
> would make the test invalid.  Remove the unnecessary NULL check.

Applied to 5.14/scsi-staging, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering