Re: [PATCH tip/core/rcu 2/2] documentation: Record reason for rcu_head two-byte alignment

[Geert Uytterhoeven]

On Tue, Aug 23, 2016 at 4:23 PM, Paul E. McKenney
<paulmck@xxxxxxxxxxxxxxxxxx> wrote:
> commit 89d39c83d193733ed5fff1c480cd42c9de1da404
> Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
> Date:   Tue Aug 23 06:51:47 2016 -0700
>
>     rcu: Tighted up __call_rcu() rcu_head alignment check
>
>     Commit 720abae3d68ae ("rcu: force alignment on struct
>     callback_head/rcu_head") forced the rcu_head (AKA callback_head)
>     structure's alignment to pointer size, that is, to 4-byte boundaries on
>     32-bit systems and to 8-byte boundaries on 64-bit systems.  This
>     commit therefore checks for this same alignment in __call_rcu(),
>     which used to check for two-byte alignment.
>
>     Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
>     Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
>     Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>

Tested-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds