Re: [PATCH 2/7] xsm/flask: sidtab: Fix MISRA C 2012 Rule 20.7 violations

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Fri, 19 Aug 2022, Xenia Ragiadakou wrote:
> In macros SIDTAB_HASH(), INIT_SIDTAB_LOCK(), SIDTAB_LOCK() and 
> SIDTAB_UNLOCK(),
> add parentheses around the macro parameter to prevent against unintended
> expansions.
> 
> Signed-off-by: Xenia Ragiadakou <burzalodowa@xxxxxxxxx>

Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>


> ---
>  xen/xsm/flask/ss/sidtab.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/xen/xsm/flask/ss/sidtab.c b/xen/xsm/flask/ss/sidtab.c
> index 74babfac9c..69fc3389b3 100644
> --- a/xen/xsm/flask/ss/sidtab.c
> +++ b/xen/xsm/flask/ss/sidtab.c
> @@ -14,11 +14,11 @@
>  #include "security.h"
>  #include "sidtab.h"
>  
> -#define SIDTAB_HASH(sid) (sid & SIDTAB_HASH_MASK)
> +#define SIDTAB_HASH(sid) ((sid) & SIDTAB_HASH_MASK)
>  
> -#define INIT_SIDTAB_LOCK(s) spin_lock_init(&s->lock)
> -#define SIDTAB_LOCK(s) spin_lock(&s->lock)
> -#define SIDTAB_UNLOCK(s) spin_unlock(&s->lock)
> +#define INIT_SIDTAB_LOCK(s) spin_lock_init(&(s)->lock)
> +#define SIDTAB_LOCK(s) spin_lock(&(s)->lock)
> +#define SIDTAB_UNLOCK(s) spin_unlock(&(s)->lock)
>  
>  int sidtab_init(struct sidtab *s)
>  {
> -- 
> 2.34.1
> 
>