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[PATCH] NOMMU: Use find_vma() rather than reimplementing a VMA search

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Use find_vma() in the NOMMU version of access_process_vm() rather than
reimplementing it.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
David Howells 2006-09-27 01:50:16 -07:00 committed by Linus Torvalds
parent 5da6185bca
commit 0159b141d8
1 changed files with 3 additions and 8 deletions
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11
mm/nommu.c
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@ -1039,6 +1039,7 @@ unsigned long do_mremap(unsigned long addr,
/*
* Look up the first VMA which satisfies addr < vm_end, NULL if none
* - should be called with mm->mmap_sem at least readlocked
*/
struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr)
{
@ -1213,7 +1214,6 @@ struct page *filemap_nopage(struct vm_area_struct *area,
*/
int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, int len, int write)
{
struct vm_list_struct *vml;
struct vm_area_struct *vma;
struct mm_struct *mm;
@ -1227,13 +1227,8 @@ int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, in
down_read(&mm->mmap_sem);
/* the access must start within one of the target process's mappings */
for (vml = mm->context.vmlist; vml; vml = vml->next)
if (addr >= vml->vma->vm_start && addr < vml->vma->vm_end)
break;
if (vml) {
vma = vml->vma;
vma = find_vma(mm, addr);
if (vma) {
/* don't overrun this mapping */
if (addr + len >= vma->vm_end)
len = vma->vm_end - addr;