From: David Howells <dhowells@redhat.com>
The attached patch implements a nommu version of find_vma().
Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
25-akpm/mm/nommu.c | 13 ++++++++++++-
1 files changed, 12 insertions(+), 1 deletion(-)
diff -puN mm/nommu.c~implement-nommu-find_vma mm/nommu.c
--- 25/mm/nommu.c~implement-nommu-find_vma Thu Dec 16 15:21:46 2004
+++ 25-akpm/mm/nommu.c Thu Dec 16 15:21:46 2004
@@ -793,11 +793,22 @@ unsigned long do_mremap(unsigned long ad
return vml->vma->vm_start;
}
-struct vm_area_struct * find_vma(struct mm_struct * mm, unsigned long addr)
+/*
+ * Look up the first VMA which satisfies addr < vm_end, NULL if none
+ */
+struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr)
{
+ struct vm_list_struct *vml;
+
+ for (vml = mm->context.vmlist; vml; vml = vml->next)
+ if (addr >= vml->vma->vm_start && addr < vml->vma->vm_end)
+ return vml->vma;
+
return NULL;
}
+EXPORT_SYMBOL(find_vma);
+
struct page * follow_page(struct mm_struct *mm, unsigned long addr, int write)
{
return NULL;
_