linux-kernel - Re: [PATCH] scsi: ufs: ufshcd: Remove VLA usage

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Message-ID: <yq1tvr5gha4.fsf@oracle.com>
Date:   Fri, 18 May 2018 10:38:59 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     "Martin K. Petersen" <martin.petersen@...cle.com>,
        Vinayak Holikatti <vinholikatti@...il.com>,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi: ufs: ufshcd: Remove VLA usage


Kees,

> On the quest to remove all VLAs from the kernel[1] this moves buffers
> off the stack. In the second instance, this collapses two separately
> allocated buffers into a single buffer, since they are used
> consecutively, which saves 256 bytes (QUERY_DESC_MAX_SIZE + 1) of
> stack space.

Applied to 4.18/scsi-queue. Thank you!

-- 
Martin K. Petersen	Oracle Linux Engineering