}
module_init(init_tmpfs)
-/*
+/**
* shmem_file_setup - get an unlinked file living in tmpfs
- *
* @name: name for dentry (to be seen in /proc/<pid>/maps
* @size: size to be set for the file
- *
+ * @flags: vm_flags
*/
struct file *shmem_file_setup(char *name, loff_t size, unsigned long flags)
{
if (!dentry)
goto put_memory;
- error = -ENOSPC;
- inode = ramfs_get_inode(root->d_sb, S_IFREG | S_IRWXUGO, 0);
- if (!inode)
- goto put_dentry;
-
- d_instantiate(dentry, inode);
error = -ENFILE;
- file = alloc_file(shm_mnt, dentry, FMODE_WRITE | FMODE_READ,
- &ramfs_file_operations);
+ file = get_empty_filp();
if (!file)
goto put_dentry;
- inode->i_nlink = 0; /* It is unlinked */
-
- /* notify everyone as to the change of file size */
- error = do_truncate(dentry, size, 0, file);
- if (error < 0)
+ error = -ENOSPC;
+ inode = ramfs_get_inode(root->d_sb, S_IFREG | S_IRWXUGO, 0);
+ if (!inode)
goto close_file;
+ d_instantiate(dentry, inode);
+ inode->i_size = size;
+ inode->i_nlink = 0; /* It is unlinked */
+ init_file(file, shm_mnt, dentry, FMODE_WRITE | FMODE_READ,
+ &ramfs_file_operations);
return file;
close_file:
return ERR_PTR(error);
}
-/*
+/**
* shmem_zero_setup - setup a shared anonymous mapping
- *
* @vma: the vma to be mmapped is prepared by do_mmap_pgoff
*/
int shmem_zero_setup(struct vm_area_struct *vma)