diff options
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index f7786542c59d..538c905d6d9b 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1102,28 +1102,22 @@ unsigned long do_mmap_pgoff(struct file *file, unsigned long addr, return mmap_region(file, addr, len, flags, vm_flags, pgoff); } -static unsigned long do_mmap(struct file *file, unsigned long addr, +unsigned long vm_mmap(struct file *file, unsigned long addr, unsigned long len, unsigned long prot, unsigned long flag, unsigned long offset) { + unsigned long ret; + struct mm_struct *mm = current->mm; + if (unlikely(offset + PAGE_ALIGN(len) < offset)) return -EINVAL; if (unlikely(offset & ~PAGE_MASK)) return -EINVAL; - return do_mmap_pgoff(file, addr, len, prot, flag, offset >> PAGE_SHIFT); -} - -unsigned long vm_mmap(struct file *file, unsigned long addr, - unsigned long len, unsigned long prot, - unsigned long flag, unsigned long offset) -{ - unsigned long ret; - struct mm_struct *mm = current->mm; ret = security_mmap_file(file, prot, flag); if (!ret) { down_write(&mm->mmap_sem); - ret = do_mmap(file, addr, len, prot, flag, offset); + ret = do_mmap_pgoff(file, addr, len, prot, flag, offset >> PAGE_SHIFT); up_write(&mm->mmap_sem); } return ret; |