From: Wei Liu <wei.liu2@citrix.com>
To: Paulina Szubarczyk <paulinaszubarczyk@gmail.com>
Cc: sstabellini@kernel.org, wei.liu2@citrix.com,
ian.jackson@eu.citrix.com, david.vrabel@citrix.com,
anthony.perard@citrix.com, xen-devel@lists.xenproject.org,
roger.pau@citrix.com
Subject: Re: [PATCH v3 1/2] Interface for grant copy operation in libs.
Date: Fri, 8 Jul 2016 14:18:46 +0100 [thread overview]
Message-ID: <20160708131846.GV416@citrix.com> (raw)
In-Reply-To: <1466584733-19459-2-git-send-email-paulinaszubarczyk@gmail.com>
To unblock Paulina on her series, I would be ok with the cast provided
there is compile-time check to ensure the user-space structure is
identical to the ioctl structure.
That would involve:
1. Introducing BUILD_BUG_ON, offsetof, alignof to libs/ if they are not
already available.
2. BUILD_BUG_ON(sizeof(A) != sizeof(B))
3. BUILD_BUG_ON(offsetof(A, f1) != offsetof(B, f1)) (enumerate all
fields)
4. BUILD_BUG_ON(alignof(A) != alignof(B))
Paulina, let me know if you would be interested in doing #1. Normally
this requires reading compiler manuals and some coding. I can give you
more details if you're up for the task, otherwise I will try to find
some time to do it myself.
Wei.
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next prev parent reply other threads:[~2016-07-08 13:18 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-22 8:38 [PATCH v3 0/2] qemu-qdisk: Implementation of grant copy operation Paulina Szubarczyk
2016-06-22 8:38 ` [PATCH v3 1/2] Interface for grant copy operation in libs Paulina Szubarczyk
2016-06-22 9:37 ` David Vrabel
2016-06-22 9:53 ` Paulina Szubarczyk
2016-06-22 11:24 ` Wei Liu
2016-06-22 14:19 ` Paulina Szubarczyk
2016-06-22 11:21 ` Wei Liu
2016-06-22 12:37 ` David Vrabel
2016-06-22 13:29 ` Wei Liu
2016-06-22 13:52 ` David Vrabel
2016-06-22 14:52 ` Wei Liu
2016-06-22 16:49 ` Wei Liu
2016-07-06 15:49 ` Roger Pau Monné
2016-07-05 16:27 ` George Dunlap
2016-07-08 13:18 ` Wei Liu [this message]
2016-07-13 9:12 ` Wei Liu
2016-06-22 8:38 ` [PATCH v3 2/2] qdisk - hw/block/xen_disk: grant copy implementation Paulina Szubarczyk
2016-07-13 12:34 ` Paulina Szubarczyk
2016-07-14 10:37 ` Wei Liu
2016-07-15 10:28 ` Paulina Szubarczyk
2016-07-15 11:15 ` Wei Liu
2016-07-15 17:11 ` Anthony PERARD
2016-07-19 10:16 ` Paulina Szubarczyk
2016-07-15 16:55 ` Anthony PERARD
2016-07-19 10:51 ` Paulina Szubarczyk
2016-07-19 9:12 ` Roger Pau Monné
2016-07-19 10:12 ` Paulina Szubarczyk
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