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Re: [PATCH 2/4] x86/shadow: avoid sizeof(this_cpu(...))
- To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Thu, 21 May 2026 16:29:33 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>
- Delivery-date: Thu, 21 May 2026 15:29:53 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 21/05/2026 4:15 pm, Jan Beulich wrote:
> Misra C:2012 rule 13.6 takes issue with RELOC_HIDE() uses inside sizeof(),
> as used by this_cpu(). Latch the address of the per-CPU variable into a
> local variable, and use that in the two sizeof().
>
> No difference in generated code for 2- and 4-level code. There's a small
> improvement for the 3-level case.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
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