netdev - Re: [PATCH net-next] mlx5: Add MLX5_SET64_VCHK to fix BUILD_BUG

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Message-ID: <CALzJLG9f-M5OT=_W-4RO7UK+53RMrXo-BPXYtbwTuNWG-bn4Sw@mail.gmail.com>
Date:   Wed, 12 Oct 2016 11:03:51 +0900
From:   Saeed Mahameed <saeedm@....mellanox.co.il>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     Tom Herbert <tom@...bertland.com>,
        David Laight <David.Laight@...lab.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "saeedm@...lanox.com" <saeedm@...lanox.com>,
        "kernel-team@...com" <kernel-team@...com>
Subject: Re: [PATCH net-next] mlx5: Add MLX5_SET64_VCHK to fix BUILD_BUG_ON

On Wed, Oct 12, 2016 at 4:40 AM, Leon Romanovsky <leon@...nel.org> wrote:
> On Tue, Oct 11, 2016 at 08:46:45AM -0700, Tom Herbert wrote:
>> On Tue, Oct 11, 2016 at 4:57 AM, Saeed Mahameed
>> <saeedm@....mellanox.co.il> wrote:
>> > On Tue, Oct 11, 2016 at 7:50 PM, David Laight <David.Laight@...lab.com> wrote:
>> >> From: Tom Herbert
>> >>> Sent: 11 October 2016 05:22
>> >> ...
>> >>> Fix is to create MLX5_SET64_VCHK that takes an additional argument
>> >>> that is a constant. There are two callers of MLX5_SET64 that are
>> >>> trying to get a variable offset, change those to call MLX5_SET64_VCHK
>> >>> passing pas[0] as the argument to use in the offset check.
>> >>
>> >> I think I'd separate the array index instead.
>> >> Something like:
>> >>
>> >> #define MLX5_SET64_INDEXED(typ, p, fld, ndx, v) do { \
>> >>         BUILD_BUG_ON(__mlx5_bit_off(typ, fld) % 64); \
>> >>         __MLX5_SET64(typ, p, fld[ndx], v); \
>> >> } while (0)
>> >>
>> >>         David
>> >
>> > Yes, I think this looks more natural, but instead MLX5_SET64_INDEXED,
>> > I prefer to have 2 macros
>> > MLX5_SET64(typ, p, fld, v) and MLX5_ARRAY_SET64(typ, p, fld, idx, v).
>> >
>> > Tom, do you want me to fix it ?
>> >
>> Please do.
>
> Saeed,
>
> Do you success to send this patch before -rc1 is released? So Linus's
> -rc1 will be clean from such build error.
>

Just submitted the patch, it seems that i have issues with my other
Mailer, sometimes e-mails take a while to appear in the mailing list.
I Hope the patch will arrive on time for Dave to pick it it up.

Thanks,
-Saeed.