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Re: [XEN PATCH v3 03/16] misra: add deviations for direct inclusion guards
- To: Simone Ballarin <simone.ballarin@xxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 11 Mar 2024 11:08:50 +0100
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- Cc: consulting@xxxxxxxxxxx, sstabellini@xxxxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Wei Liu <wl@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 11 Mar 2024 10:08:57 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 11.03.2024 09:59, Simone Ballarin wrote:
> Add deviation comments to address violations of
> MISRA C:2012 Directive 4.10 ("Precautions shall be taken in order
> to prevent the contents of a header file being included more than
> once").
>
> Inclusion guards must appear at the beginning of the headers
> (comments are permitted anywhere).
>
> This patch adds deviation comments using the format specified
> in docs/misra/safe.json for headers with just the direct
> inclusion guard before the inclusion guard since they are
> safe and not supposed to comply with the directive.
>
> Signed-off-by: Simone Ballarin <simone.ballarin@xxxxxxxxxxx>
>
> ---
> Changes in v3:
> - fix inconsistent deviation ID
> The patch has been introduced in v2.
> ---
> docs/misra/safe.json | 8 ++++++++
> xen/arch/arm/include/asm/hypercall.h | 1 +
> xen/arch/x86/include/asm/hypercall.h | 1 +
> 3 files changed, 10 insertions(+)
What about asm-generic/hypercall.h?
> --- a/xen/arch/arm/include/asm/hypercall.h
> +++ b/xen/arch/arm/include/asm/hypercall.h
> @@ -1,3 +1,4 @@
> +/* SAF-5-safe direct inclusion guard before */
> #ifndef __XEN_HYPERCALL_H__
> #error "asm/hypercall.h should not be included directly - include
> xen/hypercall.h instead"
> #endif
> --- a/xen/arch/x86/include/asm/hypercall.h
> +++ b/xen/arch/x86/include/asm/hypercall.h
> @@ -2,6 +2,7 @@
> * asm-x86/hypercall.h
> */
>
> +/* SAF-5-safe direct inclusion guard before */
> #ifndef __XEN_HYPERCALL_H__
> #error "asm/hypercall.h should not be included directly - include
> xen/hypercall.h instead"
> #endif
Iirc it was said that this way checking for correct guards is suppressed
altogether in Eclair, which is not what we want. Can you clarify this,
please?
Jan
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