tree 5301be7b4d4310faa8db5a0d027b81421e36570e
parent fd8328be874f4190a811c58cd4778ec2c74d2c05
author Al Viro <viro@zeniv.linux.org.uk> 1208856690 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1209129839 -0400

[PATCH] sanitize unshare_files/reset_files_struct

* let unshare_files() give caller the displaced files_struct
* don't bother with grabbing reference only to drop it in the
  caller if it hadn't been shared in the first place
* in that form unshare_files() is trivially implemented via
  unshare_fd(), so we eliminate the duplicate logics in fork.c
* reset_files_struct() is not just only called for current;
  it will break the system if somebody ever calls it for anything
  else (we can't modify ->files of somebody else).  Lose the
  task_struct * argument.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>