lkml.org 
[lkml]   [2009]   [Dec]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/19] untangling do_mremap(), part 1
Hi!

> Take locating vma and checks on it to a separate helper (it will be
> shared between MREMAP_FIXED/non-MREMAP_FIXED cases when we split
> them in the next patch)

> +static struct vm_area_struct *vma_to_resize(unsigned long addr,
> + unsigned long old_len, unsigned long new_len, unsigned long *p)
> +{
> + struct mm_struct *mm = current->mm;
> + struct vm_area_struct *vma = find_vma(mm, addr);
> +
> + if (!vma || vma->vm_start > addr)
> + goto Efault;
> +
> + if (is_vm_hugetlb_page(vma))
> + goto Einval;
> +
> + /* We can't remap across vm area boundaries */
> + if (old_len > vma->vm_end - addr)
> + goto Efault;
...
> +Efault: /* very odd choice for most of the cases, but... */
> + return ERR_PTR(-EFAULT);
> +Einval:
> + return ERR_PTR(-EINVAL);
> +Enomem:
> + return ERR_PTR(-ENOMEM);
> +Eagain:
> + return ERR_PTR(-EAGAIN);
> +}

Could we just do returns directly, w/o the gotos? In this case I do
not think goto has advantages, as there's no cleanup to do...

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


\
 
 \ /
  Last update: 2009-12-13 02:45    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site