diff options
Diffstat (limited to 'fs/proc/inode.c')
| -rw-r--r-- | fs/proc/inode.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 9f8ef9b7674d..124fc43c7090 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -285,15 +285,27 @@ static int proc_reg_mmap(struct file *file, struct vm_area_struct *vma) return rv; } -static unsigned long proc_reg_get_unmapped_area(struct file *file, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags) +static unsigned long +proc_reg_get_unmapped_area(struct file *file, unsigned long orig_addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) { struct proc_dir_entry *pde = PDE(file_inode(file)); - int rv = -EIO; - unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long); + unsigned long rv = -EIO; + if (use_pde(pde)) { - get_unmapped_area = pde->proc_fops->get_unmapped_area; - if (get_unmapped_area) - rv = get_unmapped_area(file, orig_addr, len, pgoff, flags); + typeof(proc_reg_get_unmapped_area) *get_area; + + get_area = pde->proc_fops->get_unmapped_area; +#ifdef CONFIG_MMU + if (!get_area) + get_area = current->mm->get_unmapped_area; +#endif + + if (get_area) + rv = get_area(file, orig_addr, len, pgoff, flags); + else + rv = orig_addr; unuse_pde(pde); } return rv; |