Re: [PATCH 3/3] mm/nommu: drop unlikely behind BUG_ON()

[Leon Romanovsky]

On Sun, Oct 4, 2015 at 9:18 AM, Geliang Tang <geliangtang@xxxxxxx> wrote:
> BUG_ON() already contain an unlikely compiler flag. Drop it.
It is not the case if CONFIG_BUG and HAVE_ARCH_BUG_ON are not set.

>
> Signed-off-by: Geliang Tang <geliangtang@xxxxxxx>
> ---
>  mm/nommu.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/mm/nommu.c b/mm/nommu.c
> index 1e0f168..92be862 100644
> --- a/mm/nommu.c
> +++ b/mm/nommu.c
> @@ -578,16 +578,16 @@ static noinline void validate_nommu_regions(void)
>                 return;
>
>         last = rb_entry(lastp, struct vm_region, vm_rb);
> -       BUG_ON(unlikely(last->vm_end <= last->vm_start));
> -       BUG_ON(unlikely(last->vm_top < last->vm_end));
> +       BUG_ON(last->vm_end <= last->vm_start);
> +       BUG_ON(last->vm_top < last->vm_end);
>
>         while ((p = rb_next(lastp))) {
>                 region = rb_entry(p, struct vm_region, vm_rb);
>                 last = rb_entry(lastp, struct vm_region, vm_rb);
>
> -               BUG_ON(unlikely(region->vm_end <= region->vm_start));
> -               BUG_ON(unlikely(region->vm_top < region->vm_end));
> -               BUG_ON(unlikely(region->vm_start < last->vm_top));
> +               BUG_ON(region->vm_end <= region->vm_start);
> +               BUG_ON(region->vm_top < region->vm_end);
> +               BUG_ON(region->vm_start < last->vm_top);
>
>                 lastp = p;
>         }
> --
> 2.5.0
>
>
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-- 
Leon Romanovsky | Independent Linux Consultant
        www.leon.nu | leon@xxxxxxx
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