diff options
| author | David Howells <dhowells@redhat.com> | 2006-09-27 10:50:16 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-27 17:26:14 +0200 |
| commit | 0159b141d8b1f9b9f9cffacae47bec1e05c63b8b (patch) | |
| tree | 2555ce3afb2307b4532be4247d1f87e06f0071d0 | |
| parent | [PATCH] NOMMU: Set BDI capabilities for /dev/mem and /dev/kmem (diff) | |
| download | linux-0159b141d8b1f9b9f9cffacae47bec1e05c63b8b.tar.xz linux-0159b141d8b1f9b9f9cffacae47bec1e05c63b8b.zip | |
[PATCH] NOMMU: Use find_vma() rather than reimplementing a VMA search
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>
| -rw-r--r-- | mm/nommu.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/mm/nommu.c b/mm/nommu.c index d08acdae0036..00ffa974c90c 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -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; |