Re: [PATCH 1/4] x8&/mm: fix IS_LnE_ALIGNED() to comply with Misra Rule 20.7

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Tue, Nov 19, 2024 at 10:52:26AM +0000, Frediano Ziglio wrote:
> On Tue, Nov 19, 2024 at 10:35 AM Roger Pau Monne <roger.pau@xxxxxxxxxx> wrote:
> >
> > While not strictly needed to guarantee operator precedence is as expected, 
> > add
> > the parentheses to comply with Misra Rule 20.7.
> >
> > No functional change intended.
> >
> > Reported-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> > Fixes: 5b52e1b0436f ('x86/mm: skip super-page alignment checks for 
> > non-present entries')
> > Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> > ---
> >  xen/arch/x86/mm.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
> > index 494c14e80ff9..fa21903eb25a 100644
> > --- a/xen/arch/x86/mm.c
> > +++ b/xen/arch/x86/mm.c
> > @@ -5498,7 +5498,7 @@ int map_pages_to_xen(
> >   * be INVALID_MFN, since alignment is only relevant for present entries.
> >   */
> >  #define IS_LnE_ALIGNED(v, m, n) ({                              \
> > -    mfn_t m_ = m;                                               \
> > +    mfn_t m_ = (m);                                             \
> >                                                                  \
> >      ASSERT(!mfn_eq(m_, INVALID_MFN));                           \
> >      IS_ALIGNED(PFN_DOWN(v) | mfn_x(m_),                         \
> 
> Minor, typo in subject: x8& -> x86

Nice, that's what you get when you press shift + 6 on a Spanish
keyboard.  Hope it can be adjusted at commit.

Thanks.